diff --git a/.gitignore b/.gitignore
index 425b7de..aebb447 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 tree_link.py
 __pycache__/**
 !.gitignore
+todo
diff --git a/README.md b/README.md
index cf6d8c6..cd7193e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Algorithm and data structures
+# Algorithm and Data Structures
 >Notes and codes for learning algorithm and data structures :smiley:
 
 Some pictures and idead are from `<<Introduction to Algotithm>>
@@ -11,40 +11,36 @@ Some scripts may have bugs or not be finished yet.
 
 # Notice
 Currently, Github can't render latex math formulas.
-So,if you wannt to view the notes which contains latex math formulas and are in markdown format, you can visit [my blog](https://mbinary.coding.me)
+So,if you wannt to view the notes which contain latex math formulas and are in markdown format, you can visit [my blog](https://mbinary.coding.me)
 
-# index
+# Index
 * [.](.)
     * [notes](./notes)
         * [alg-general.md](./notes/alg-general.md)
         * [hashTable.md](./notes/hashTable.md)
-        * [README.md](./notes/README.md)
+        * [red-black-tree.md](./notes/red-black-tree.md)
         * [sort.md](./notes/sort.md)
         * [tree.md](./notes/tree.md)
-        * [red-black-tree.md](./notes/red-black-tree.md)
     * [algorithm](./algorithm)
         * [8Astar.py](./algorithm/8Astar.py)
         * [cantor.cc](./algorithm/cantor.cc)
-        * [EIGHT.py](./algorithm/EIGHT.py)
         * [manacher.py](./algorithm/manacher.py)
         * [markov.py](./algorithm/markov.py)
-        * [README.md](./algorithm/README.md)
         * [sort](./algorithm/sort)
         * [sunday.py](./algorithm/sunday.py)
     * [dataStructure](./dataStructure)
-        * [allOone](./dataStructure/allOone)
-        * [redblack tree.py](./dataStructure/redBlackTree.py)
-        * [binaryHeap.py](./dataStructure/binaryHeap.py)
-        * [binaryIndexedTree.cc](./dataStructure/binaryIndexedTree.cc)
-        * [binaryTree.py](./dataStructure/binaryTree.py)
+        * [redBlackTree.py](./dataStructure/redBlackTree.py)
         * [hashTable.py](./dataStructure/hashTable.py)
-        * [huffman.cc](./dataStructure/huffman.cc)
+        * [splayTree.py](./dataStructure/splayTree.py)
+        * [allOone](./dataStructure/allOone)
+        * [binaryHeap.py](./dataStructure/binaryHeap.py)
+        * [binaryTree.py](./dataStructure/binaryTree.py)
+        * [graph](./dataStructure/graph)
+        * [huffman](./dataStructure/huffman)
         * [leftHeap.py](./dataStructure/leftHeap.py)
         * [loserTree.py](./dataStructure/loserTree.py)
-        * [map](./dataStructure/map)
-        * [README.md](./dataStructure/README.md)
-        * [segTree.cc](./dataStructure/segTree.cc)
-        * [splayTree.py](./dataStructure/splayTree.py)
-        * [stack](./dataStructure/stack)
+        * [map.cc](./dataStructure/map.cc)
+        * [polynomial.cpp](./dataStructure/polynomial.cpp)
+        * [polynomial.py](./dataStructure/polynomial.py)
         * [trie.py](./dataStructure/trie.py)
         * [winnerTree.py](./dataStructure/winnerTree.py)
diff --git a/algorithm/8Astar.py b/algorithm/8Astar.py
index d581e4e..db76c7a 100644
--- a/algorithm/8Astar.py
+++ b/algorithm/8Astar.py
@@ -102,11 +102,52 @@ def getPath(s,index):
         if ct is 0:
             return cur.path
         cur.move()
+def info():
+    print('input a 3x3 matrix in one line')
+    print('from left to right,from up to down') 
+    print('such as 56831247x  represent matrix as follow')
+    print('5  6  8\n3  1  2\n4  7  x')
+    print('then, if it has, I will print the path of moving x to reach state as follows')
+    print('1  2  3\n4  5  6\n7  8  x')
+    print('print q to quit')
+
+from random import shuffle
+case = list('12345678x')
+def genCase():
+    tmp = case.copy()
+    shuffle(tmp)
+    print(f'Using random data: {tmp}')
+    index = -1
+    for i,j in enumerate(tmp):
+        if j=='x':
+            index = i
+            break
+    tmp[index] = '9'
+    return tmp,index
+def isValid(li):
+    for i in '123456789':
+        if not i in li:
+            print('Invalid Input')
+            return False
+    return True
+
+def run():
+    while 1:
+        print('\n\n'+'-'*10+'Game Begins'+ '-'*10)
+        info()
+        s=input('input: ') 
+        if s=='q' or s=='Q' or s=='quit':
+            break
+        index = s.find('x')
+        li = list(s)
+        if index != -1:
+            li[index] = '9'
+        if not isValid(li):
+            li, index = genCase()
+        if solvable(li):
+            print(''.join(getPath(li,index)))
+        else:print('unsolvable')
+
 
 if __name__ == '__main__':
-    s=input()
-    index = s.find('x')
-    s =list(s)
-    s[index] = '9'
-    if solvable(s):print(''.join(getPath(s,index)))
-    else:print('unsolvable')
+    run()
diff --git a/algorithm/EIGHT.py b/algorithm/EIGHT.py
deleted file mode 100644
index 96df6cc..0000000
--- a/algorithm/EIGHT.py
+++ /dev/null
@@ -1,73 +0,0 @@
-''' mbinary
-#########################################################################
-# File : EIGHT.py
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-05-19  23:06
-# Description:
-#########################################################################
-'''
-
-from colectons import deque
-isVisted = [0]*362880
-fac = [1,2,6,24,120,720,5040,40320]
-lf = len(fac)
-x= '9'
-def cantor(s):
-    sum = 0
-    ls = len(s) 
-    for i in range(ls):
-        count = 0
-        for j in range(i+1;ls):
-            if s[i] > s[j]: count +=1
-        sum += count*fac[lf-i-1]
-    return sum
-
-que = deque() 
-class state: 
-    def __init__(self,s,p,step=0,last=0):
-        self.x = p
-        self.s = list(s) 
-        self.step = step
-        self.path = []
-        self.last = last
-    def move(self):
-        dir = [-3:'u',1:'r',3:'d',-1:'l']
-        if self.last in dir :
-            del dir[-self.last]
-        if self.x<3:
-            del dir[-3]
-        if self.x>5:
-            del dir[3]
-        if self.x%3 is 0:
-            del dir[-1]
-        if self.x%3 is 2:
-            del dir[1]
-        for i in dir.keys():
-            s = list(self.s)
-            tmp = self.x + i
-            s[self.x] = s[tmp]
-            s[tmp] = x
-            if not isVisted[cantor(s)]:
-                new = state(s,tmp,self.step +1,i)
-                new.path = self.path + [dir[i]]
-                que.append(new)
-
-def getPath(s):
-    index = s.find('x')
-    s =list(s)
-    s[index] = '9'
-    que.append(state(s,index,0,0))
-    while que != deque():
-        cur = que.popleft()
-        ct = cantor(cur.s)
-        if ct is 362879:
-            return cur.path
-        isVisted[] = 1
-        cur.move()
-
-if __name__ == '__main__':
-    s=input()
-    print(''.join(getPath(s)))
diff --git a/algorithm/README.md b/algorithm/README.md
deleted file mode 100644
index 7389c32..0000000
--- a/algorithm/README.md
+++ /dev/null
@@ -1,18 +0,0 @@
-# 算法实现
-# 索引
-
-* [.](.)
-    * [8Astar.py](./8Astar.py)
-    * [cantor.cc](./cantor.cc)
-    * [EIGHT.py](./EIGHT.py)
-    * [manacher.py](./manacher.py)
-    * [markov.py](./markov.py)
-    * [sort](./sort)
-        * [binaryTree.py](./sort/binaryTree.py)
-        * [heapSort.py](./sort/heapSort.py)
-        * [quickSort.py](./sort/quickSort.py)
-        * [radixSort.py](./sort/radixSort.py)
-        * [select.py](./sort/select.py)
-        * [shellSort.py](./sort/shellSort.py)
-    * [sunday.py](./sunday.py)
-    * [README.md](./README.md)
diff --git a/algorithm/steganography_to_do.py b/algorithm/steganography_to_do.py
deleted file mode 100644
index 8dcefab..0000000
--- a/algorithm/steganography_to_do.py
+++ /dev/null
@@ -1,81 +0,0 @@
-''' mbinary
-#########################################################################
-# File : steganography_to_do.py
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-07-06  15:57
-# Description:
-#########################################################################
-'''
-
-from PIL import Image
-from skimage import color
-import numpy as np
-import matplotlib.pyplot as plt
-import math
-import argparse
-
-
-parser = argparse.ArgumentParser()
-parser.add_argument('picture')
-parser.add_argument('-f','file')
-parser.add_argument('-s','string')
-
-args = parser.parse_args()
-
-PIC = args.picture
-FILE = args.file
-STR = args.string
-
-
-class steganography:
-    def __init__(self,picture):
-        self.pic = poicture
-
-    def handlePixel(self,target,attach):
-        '''对一个像素进行隐写 ,attach是要处理的数值，允许在0~9'''
-        a,b,c =  target
-        pa,pb,pc = attach
-        return a%10+pa,b%10+pb,c%10+pc
-    def d2n(self,n,base=16):
-        ''' num of base_n(n<36) to decimal'''
-        dic = {i:chr(i+ord('0')) for i in range(10)}
-        if base>10:
-            dic.update({i+10:chr(i+ord('A')) for i in range(26)})
-        rst=[]
-        while n!=0:
-            i=int(n/base)
-            rst.append(dic[n-i*base])
-            n=i
-        return ''.join(rst[::-1])
-    def changeBody(self,path):
-        self.pic = path
-    def encryptPic(self,content,base =8):
-        '''将bytes内容content隐写到self.picture中  base can be different value, default 8'''
-        body = np .array (Image.open(self.pic))
-        attach = np.array(content)
-        r,c, _ = body.shape
-        ar,ac,_ = attach.shape
-        
-        raise Exception('信息量太大，不能隐写在此图片中，换张更大的图片')
-    def encryptStr(self,content):
-        body = np.array (Image.open(self.pic))
-        r,c,d = body.shape
-        btay = bytearray(content)
-        length = len(btay)
-        if length*8 > (r-1)*c:raise Exception('信息量太大，不能隐写在此图片中，换张更大的图片')
-    def getContent(self,file=None,s=None):
-        '''get the bytes ,  file is prior to str'''
-        byte = b''
-        if not file:
-            if not s:
-                s = input('输入要隐写的信息')
-            byte = encode(STR,'utf-8')
-        else:byte = open(FILE,'wb').read()
-        return byte
-
-if __name__ =='__main__':
-    
-    PIC
diff --git a/dataStructure/README.md b/dataStructure/README.md
deleted file mode 100644
index f6dcf5a..0000000
--- a/dataStructure/README.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# 数据结构的实现
-# 索引
-* [.](.)
-   * [allOone](./allOone)
-       * [allOone.py](./allOone/allOone.py)
-       * [test.py](./allOone/test.py)
-   * [binaryHeap.py](./binaryHeap.py)
-   * [binaryIndexedTree.cc](./binaryIndexedTree.cc)
-   * [binaryTree.py](./binaryTree.py)
-   * [hashTable.py](./hashTable.py)
-   * [huffman.cc](./huffman.cc)
-   * [leftHeap.py](./leftHeap.py)
-   * [loserTree.py](./loserTree.py)
-   * [map](./map)
-       * [map.cc](./map/map.cc)
-       * [map.exe](./map/map.exe)
-   * [segTree.cc](./segTree.cc)
-   * [splayTree.py](./splayTree.py)
-   * [stack](./stack)
-       * [stack.cc](./stack/stack.cc)
-       * [stack.exe](./stack/stack.exe)
-       * [stack.o](./stack/stack.o)
-   * [trie.py](./trie.py)
-   * [winnerTree.py](./winnerTree.py)
-   * [README.md](./README.md)
diff --git a/dataStructure/allOone/__pycache__/allOone.cpython-37.pyc b/dataStructure/allOone/__pycache__/allOone.cpython-37.pyc
deleted file mode 100644
index 4e34468..0000000
Binary files a/dataStructure/allOone/__pycache__/allOone.cpython-37.pyc and /dev/null differ
diff --git a/dataStructure/binaryIndexedTree.cc b/dataStructure/binaryIndexedTree.cc
deleted file mode 100644
index ea71b10..0000000
--- a/dataStructure/binaryIndexedTree.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-/* mbinary
-#########################################################################
-# File : binaryIndexedTree.cc
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-05-19  23:06
-# Description:
-#########################################################################
-*/
-
-class bit
-{
-    int n;
-    int *p;
-public:
-    bit(int *,int);
-    ~bit();
-    int init(int,int,bool);
-    int getSum(int a,int b){return getSum(a)-getSum(b)};
-    int getSum(int);
-    void update(int,int);
-};
-bit::bit(int *a,int j)
-{
-    p=new int[j+1];
-    n=j;
-    for (int i=0;i<n ;++i )p[i+1]=a[i]    ;
-    int i;
-    while(i<n)i*=2;
-    init(1,i,true);
-}
-int bit::init(int a,int b,bool isLeft)
-{
-    if(a==b)return p[k];
-    int l=init(a,(a+b)/2,true);
-    int r=init((a+b)/2+1,b,false);
-    if(isLeft)p[b]=l+r;
-    return p[b];
-}
-int bit::getSum(int a)
-{
-    int rst=0;
-    while(a!=0){
-        rst+=p[a];
-        a-=a&-a;
-    }
-    return rst;
-}
-void bit::update(int i , int x)
-{
-    int delta=x-p[i]
-    while(i<n){
-        p[i] = delta;
-        i+=i&-i;
-    }
-}
diff --git a/project/graph/adjacentList.py b/dataStructure/graph/adjacentList.py
similarity index 100%
rename from project/graph/adjacentList.py
rename to dataStructure/graph/adjacentList.py
diff --git a/project/graph/directed.py b/dataStructure/graph/directed.py
similarity index 100%
rename from project/graph/directed.py
rename to dataStructure/graph/directed.py
diff --git a/project/graph/graph.cc b/dataStructure/graph/graph.cc
similarity index 100%
rename from project/graph/graph.cc
rename to dataStructure/graph/graph.cc
diff --git a/project/graph/undirected.py b/dataStructure/graph/undirected.py
similarity index 100%
rename from project/graph/undirected.py
rename to dataStructure/graph/undirected.py
diff --git a/dataStructure/huffman.cc b/dataStructure/huffman.cc
deleted file mode 100644
index 7195cd2..0000000
--- a/dataStructure/huffman.cc
+++ /dev/null
@@ -1,376 +0,0 @@
-/* mbinary
-#########################################################################
-# File : huffman.cc
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-05-19  23:06
-# Description:
-#########################################################################
-*/
-
-#include<math.h>
-#include<stdio.h>
-#include<direct.h>
-#include<iostream>
-#include<algorithm>
-#include<map>
-#include<windows.h>
-#include<iomanip>
-#include<string>
-#include<vector>
-#include<queue>
-#define numDigit 10
-#define nameLength 50
-#define  starNum  80
-using namespace std;
-
-void cat(string s)
-{
-    FILE* f=fopen(s.c_str(),"rb");
-    cout<<"file content"<<endl;
-    while(!feof(f)){
-        cout<<fgetc(f);
-    }
-    cout<<endl;
-}
-string uniFileName(string file)
-{
-    FILE * check = fopen(file.c_str(),"rb");
-    if(check){
-        char c;
-        cout<<"the file "<<file<<" already exists! continue?  [Y/n]:"<<flush;
-        c=cin.get();
-        if(c=='n')exit(0);
-        int p,q;
-        p= file.find('(');
-        q=file.rfind('.');
-        if(q==string::npos)q=file.size();
-        if(p==string::npos)p=q;
-        string name=file.substr(0,p),suffix=file.substr(q,file.size());
-        int n=0;
-        while(true){
-            char s[3];
-            n+=1;
-            itoa(n,s,10);
-            file=(name+"("+s+")"+suffix);
-            FILE* f=fopen(file.c_str(),"rb");
-            if(!f)break;
-            else fclose(f);
-        }
-    }
-    return file;
-}
-template<class t1, class t2>
-void mapprint(map<t1,t2> &f)
-{
-    for(class map<t1,t2>::iterator i = f.begin();i!=f.end();++i)
-        cout<<i->first<<") : "<<i->second<<endl;
-}
-template<typename ky,typename wt>
-class node
-{
-  public:
-    ky key;
-    wt val;
-    bool visited;
-    node * left,*right;
-    node(const node &a){val = a.val;key= a.key;visited = a.visited;left= a.left;right=a.right;}
-    node(ky k=0,wt v=0):key(k),val(v),visited(false),left(NULL),right(NULL){};
-    bool operator<(const node<ky,wt> & a)const{return val>a.val;};
-};
-template<typename ky,typename wt>
-class huffman
-{
-private:
-    node<ky,wt> root;
-    string res;
-public:
-    long total(){return root.val;}
-    map<ky,string> encode_map;
-    map<string,ky> decode_map;
-    huffman(map<ky,wt>& mp);
-    void display();
-    string  encode(string,long &);
-    string  decode(string,long&);
-    void preOrder(node<ky,wt>*,string);
-};
-template<typename ky,typename wt>
-huffman<ky,wt>::huffman(map<ky,wt>& mp)
-{
-    if(mp.empty()){
-        cout<<"Error! No data!"<<endl;
-        root=NULL;
-        return ;
-    }
-    priority_queue<node<ky,wt> > hp;
-    for(typename map<ky,wt>::iterator i=mp.begin();i!=mp.end();++i){
-        hp.push( node<ky,wt>(i->first,i->second));
-    }
-    int n =hp.size();
-    if(n==1){
-        root = hp.top();
-        return;
-    }
-    while(--n>=1){
-        node<ky,wt> *a = new node<ky,wt>(hp.top());
-        hp.pop();
-        node<ky,wt> *b = new node<ky,wt>(hp.top());
-        hp.pop();
-        node<ky,wt> * tmp = new node<ky,wt>(0,a->val+b->val);
-        tmp->left = a,tmp->right = b;
-        hp.push(*tmp);
-    }
-    root = hp.top();
-    preOrder(&root,string());
-}
-template<typename ky,typename wt>
-void huffman<ky,wt>::preOrder(node<ky, wt>* nd,string s)
-{
-    if(nd->left == NULL){
-        encode_map[nd->key] =s;
-        decode_map[s] = nd->key;
-        delete nd;
-        return ;
-    }
-    preOrder(nd->left,s+'0');
-    preOrder(nd->right,s+'1');
-    delete nd;
-}
-template<typename ky,typename wt>
-string  huffman<ky,wt>::decode(string zipfile_name,long &charNum)
-{
-    string uniFileName(string);
-    FILE * src = fopen(zipfile_name.c_str(),"rb");
-    char file_name[nameLength];
-    fgets(file_name,nameLength,src);
-    int ct=-1;
-    while(file_name[++ct]!='\n');
-    int pos = zipfile_name.find('.');
-    if(pos==string::npos)pos=zipfile_name.size();
-    string name(zipfile_name.substr(0,pos)) ,suffix(file_name,file_name+ct),file(name+suffix);
-    file=uniFileName(file);
-    cout<<"extracting compressed file :"<<zipfile_name<<endl;
-    FILE * f = fopen(file.c_str(),"wb");
-    char t[numDigit];
-    fgets(t,numDigit,src);
-    int sz=atoi(t);
-    char code[sz];
-    fread(code,sz,1,src);
-    int idx=0;
-    for(int i =0;i<sz;++i ){
-        if(code[i]==' '){
-            decode_map[string(code+idx,code+i)]=code[++i];
-            idx=i+1;
-        }
-    }
-    for(int i=0;i<starNum;++i)cout<<"@";
-    cout<<endl;
-    char c;
-    long cur=charNum,gap=charNum/starNum;
-    while(cur){
-        c=fgetc(src);
-        if(!((--cur)%gap))cout<<"@"<<flush;
-        for(int i =0;i<8;++i){
-            if(c&(1<<i))res.append(1,'1');
-            else res.append(1,'0');
-            if(decode_map.count(res)!=0){
-                fputc(decode_map[res],f);
-                res.clear();
-            }
-        }
-    }
-    cout<<endl;
-    c=fgetc(src);
-    int dgt=fgetc(src);
-    cout<<feof(f);
-    if((int)dgt!=-1 ){
-        for(int i =0;i<dgt;++i){
-            if(c&(1<<i))res.append(1,'1');
-            else res.append(1,'0');
-            if(decode_map.count(res)!=0){
-                fputc(decode_map[res],f);
-                res.clear();
-                break;
-            }
-        }
-    }
-    fclose(src);
-    fclose(f);
-    cout<<"get "<<file <<" successfully"<<endl;
-    return file;
-}
-template<typename ky,typename wt>
-string huffman<ky,wt>::encode(string file_name,long &charNum)
-{
-    charNum=0;
-    string uniFileName(string);
-    int pos =file_name.rfind('.');
-    if(pos==string::npos)pos=file_name.size();
-    string zipfile = file_name.substr(0,pos)+string(".zzip");
-    zipfile = uniFileName(zipfile);
-    cout<<"generating zip file :"<<zipfile<<endl;
-    FILE * dst = fopen(zipfile.c_str(),"wb");
-    FILE * f = fopen(file_name.c_str(),"rb");
-    fputs(file_name.substr(pos).c_str(),dst);
-    fputc('\n',dst);
-    string data;
-    for(class map<string,ky>::iterator i=decode_map.begin();i!=decode_map.end() ;++i ){
-        data.append((i->first));
-        data.append(" ");
-        data+=(i->second);
-    }
-    int data_size = data.size();  // calculate the size of the code_data
-    char sz[numDigit];
-    itoa(data_size,sz,numDigit);
-    int ct=0;
-    for(;sz[ct];++ct)fputc(sz[ct],dst);
-    fputc('\n',dst);
-    fwrite(data.c_str(),data_size,1,dst);
-    int  sum=0,digit=0,num;
-    string code8;
-    for(int i=0;i<starNum;++i)cout<<"@";
-    cout<<endl;
-    long gap=root.val/starNum,cur=0;
-    while(!feof(f)){
-        code8=encode_map[fgetc(f)];
-        if(!((++cur)%gap))cout<<"@";
-        for(int i=0;i<code8.size();++i){
-            if(code8[i]=='1')sum += 1<<(digit);   //mistake  if(tmp[j])
-            ++digit;
-            if(digit==8){
-                ++charNum;
-                fputc(sum,dst);
-                digit=sum=0;
-            }
-        }
-    }
-    cout<<endl;
-    if(digit!=0){   //mark
-        fputc(sum,dst);
-        fputc(digit,dst);
-    }
-    fclose(f);
-    fclose(dst);
-    cout<<"compress "<<file_name <<" successfully"<<endl;
-    return zipfile;
-}
-template<typename ky,typename wt>
-void huffman<ky,wt>::display()
-{
-    cout<<"the encoding map,huffman codes are as bellow:"<<endl;
-    for (typename map<ky,string>::iterator i=encode_map.begin();i!=encode_map.end() ;++i )
-        cout<<i->first<<"("<<(int)i->first<<"):"<<i->second<<endl;
-}
-bool handle_one(string file_name,vector<long> &origin,vector<long> &compressed)
-{
-    int name_length = file_name.size();
-    FILE *src=fopen(file_name.c_str(),"rb");
-    cout<<"opening "<<file_name<<"..."<<endl;
-    if(!src){
-        cout<<"Path Error! Opening "<<file_name<<" Failed"<<endl;
-        origin.push_back(0);
-        compressed.push_back(0);
-        return false;
-    }
-    char cur;
-    map<char,long> mp;
-    while(!feof(src)){
-        fread(&cur,sizeof(char),1,src);
-        if(mp.count(cur)){
-            mp[cur]+=1;
-        }
-        else mp[cur]=1;
-    }
-    fclose(src);
-    huffman<char,long> hf(mp);
-    long sz;
-    string s(hf.encode(file_name,sz));
-    origin.push_back(hf.total()),compressed.push_back(sz);
-    cout<<"\ncontinue to uncompress? [Y/n]"<<endl;
-    char c=cin.get();
-    if(c=='n')return true;
-    hf.decode(s,sz);
-    return true;
-}
-bool isSep(char c)
-{
-    return c==' '||c=='\n'||c=='\t'||c==',';
-}
-void splitToVec(char * s,vector<string>& v)
-{
-    int i=0,last=0;
-    for(;s[i];++i){
-        if(isSep(s[i])){
-            v.push_back(string(s+last,s+i));
-            while(s[++i]&&isSep(s[i]));
-            last=i;
-        }
-    }
-    if(s[last])v.push_back(string(s+last,s+i));
-}
-bool lenStr(string &a,string &b)
-{
-    return a.size()<b.size();
-}
-void go(vector<string> & names)
-{
-    vector<long> originSize,compressedSize;
-    vector<int> deltaTime;
-    double last;
-    vector<bool> indicator;
-    bool bl;
-    for(vector<string>::iterator i=names.begin();i!=names.end();++i){
-        last=GetTickCount();
-        bl=handle_one(*i,originSize,compressedSize);
-        indicator.push_back(bl);
-        deltaTime.push_back(GetTickCount()-last);
-    }
-    cout<<"\ndealt file number  "<<originSize.size()<<fixed<<setprecision(2)<<endl;
-    vector<string>::iterator p=max_element(names.begin(),names.end(),lenStr);
-    int len = p->size()+2;
-    for(int i =0;i<names.size();++i){
-        if(! indicator[i]){continue;}
-        cout<<names[i]<<string(len-names[i].size(),' ');
-        cout<<deltaTime[i]<<"ms  "<<compressedSize[i]/1024.0<<"KB/"<<originSize[i]/1024.0<<"KB :";
-        cout<<compressedSize[i]*100.0/originSize[i]<<"%"<<endl;
-    }
-    cout<<endl;
-    system("pause");
-    system("pause");
-}
-int main(int argv,char ** argc)
-{
-    _chdir("C:\\Users\\mbinary\\Desktop\\dataStructrue\\huffman");
-    char cwd[50];
-    cout<<getcwd(cwd,50)<<endl;
-    string file1("GitHubDesktopSetup.exe");
-    string file("δ.mp4");
-    vector<string> names;
-    if(argv>1){
-        for(int i=1;i<argv;++i){
-            names.push_back(argc[i]);
-        }
-        go(names);
-        names.clear();
-    }
-    char mk;
-    while(1){
-        char s[201];
-        cout<<"input file names separated by space "<<endl;
-        cout<<"OR press enter to use the default file:"<<file<<endl;
-        if(cin.peek()=='\n')names.push_back(file);
-        else {
-            cin.getline(s,200);
-            splitToVec(s,names);
-        }
-        cout<<endl;
-        go(names);
-        cout<<"continue to compress or uncompress files?  [Y/n]:"<<flush;
-        mk= cin.get();
-        if(mk=='n')break;
-        names.clear();
-    }
-    return 0;
-}
diff --git a/project/huffman/huffman.cc b/dataStructure/huffman/huffman.cc
similarity index 93%
rename from project/huffman/huffman.cc
rename to dataStructure/huffman/huffman.cc
index c336f14..ae34a0b 100644
--- a/project/huffman/huffman.cc
+++ b/dataStructure/huffman/huffman.cc
@@ -12,15 +12,15 @@
 
 #include<math.h>
 #include<stdio.h>
-#include<direct.h>
 #include<iostream>
 #include<algorithm>
 #include<map>
-#include<windows.h>
+#include<unistd.h>
 #include<iomanip>
 #include<string>
 #include<vector>
 #include<queue>
+#include<sys/time.h>
 #define numDigit 10
 #define nameLength 50
 #define  starNum  80
@@ -53,7 +53,7 @@ string uniFileName(string file)
         while(true){
             char s[3];
             n+=1;
-            itoa(n,s,10);
+            snprintf(s,3,"%d",n); 
             file=(name+"("+s+")"+suffix);
             FILE* f=fopen(file.c_str(),"rb");
             if(!f)break;
@@ -223,7 +223,7 @@ string huffman<ky,wt>::encode(string file_name,long &charNum)
     }
     int data_size = data.size();  // calculate the size of the code_data
     char sz[numDigit];
-    itoa(data_size,sz,numDigit);
+    snprintf(sz,numDigit,"%d",data_size); 
     int ct=0;
     for(;sz[ct];++ct)fputc(sz[ct],dst);
     fputc('\n',dst);
@@ -322,31 +322,32 @@ void go(vector<string> & names)
     vector<bool> indicator;
     bool bl;
     for(vector<string>::iterator i=names.begin();i!=names.end();++i){
-        last=GetTickCount();
+        struct timeval tv;
+        gettimeofday(&tv,NULL);
+        last=tv.tv_sec;
         bl=handle_one(*i,originSize,compressedSize);
         indicator.push_back(bl);
-        deltaTime.push_back(GetTickCount()-last);
+        gettimeofday(&tv,NULL);
+        deltaTime.push_back(tv.tv_sec-last);
     }
-    cout<<"\ndealt file number  "<<originSize.size()<<fixed<<setprecision(2)<<endl;
+    cout<<"\nDealt file number  "<<originSize.size()<<fixed<<setprecision(2)<<endl;
     vector<string>::iterator p=max_element(names.begin(),names.end(),lenStr);
     int len = p->size()+2;
     for(int i =0;i<names.size();++i){
         if(! indicator[i]){continue;}
         cout<<names[i]<<string(len-names[i].size(),' ');
-        cout<<deltaTime[i]<<"ms  "<<compressedSize[i]/1024.0<<"KB/"<<originSize[i]/1024.0<<"KB :";
+        cout<<deltaTime[i]<<"s  "<<compressedSize[i]/1024.0<<"KB/"<<originSize[i]/1024.0<<"KB :";
         cout<<compressedSize[i]*100.0/originSize[i]<<"%"<<endl;
     }
     cout<<endl;
     system("pause");
-    system("pause");
 }
 int main(int argv,char ** argc)
 {
     char cwd[50];
     cout<<getcwd(cwd,50)<<endl;
-    string file1("GitHubDesktopSetup.exe");
-    string file("δ.mp4");
     vector<string> names;
+    string file; 
     if(argv>1){
         for(int i=1;i<argv;++i){
             names.push_back(argc[i]);
@@ -357,8 +358,7 @@ int main(int argv,char ** argc)
     char mk;
     while(1){
         char s[201];
-        cout<<"input file names separated by space "<<endl;
-        cout<<"OR press enter to use the default file:"<<file<<endl;
+        cout<<"Input file names separated by space "<<endl;
         if(cin.peek()=='\n')names.push_back(file);
         else {
             cin.getline(s,200);
@@ -366,7 +366,7 @@ int main(int argv,char ** argc)
         }
         cout<<endl;
         go(names);
-        cout<<"continue to compress or uncompress files?  [Y/n]:"<<flush;
+        cout<<"Continue?  [Y/n]:"<<flush;
         mk= cin.get();
         if(mk=='n')break;
         names.clear();
diff --git a/project/huffman/huffman.pdf b/dataStructure/huffman/huffman.pdf
similarity index 100%
rename from project/huffman/huffman.pdf
rename to dataStructure/huffman/huffman.pdf
diff --git a/project/huffman/huffman.tex b/dataStructure/huffman/huffman.tex
similarity index 100%
rename from project/huffman/huffman.tex
rename to dataStructure/huffman/huffman.tex
diff --git a/project/huffman/huffman.toc b/dataStructure/huffman/huffman.toc
similarity index 100%
rename from project/huffman/huffman.toc
rename to dataStructure/huffman/huffman.toc
diff --git a/dataStructure/loserTree.py b/dataStructure/loserTree.py
index bd74e20..c518b82 100644
--- a/dataStructure/loserTree.py
+++ b/dataStructure/loserTree.py
@@ -10,6 +10,7 @@
 #########################################################################
 '''
 
+from winnerTree import winnerTree
 class loserTree:
     '''if i<=lowExt    p = (i+offset)//2
        else           p = (i+n-1-lowExt)//2
diff --git a/dataStructure/map/map.cc b/dataStructure/map.cc
similarity index 100%
rename from dataStructure/map/map.cc
rename to dataStructure/map.cc
diff --git a/dataStructure/map/map.exe b/dataStructure/map/map.exe
deleted file mode 100644
index 2006be8..0000000
Binary files a/dataStructure/map/map.exe and /dev/null differ
diff --git a/project/polynomial/polynomial.cpp b/dataStructure/polynomial.cpp
similarity index 97%
rename from project/polynomial/polynomial.cpp
rename to dataStructure/polynomial.cpp
index b1f8532..b7fcad6 100644
--- a/project/polynomial/polynomial.cpp
+++ b/dataStructure/polynomial.cpp
@@ -10,13 +10,21 @@
 #########################################################################
 */
 
-#include<stdio.h>
-#include<string.h>
-#include<math.h>
+#include<cstdlib> 
+#include<cstdio>
+#include<cstring>
+#include<cmath>
 #include<malloc.h>
 #include<map>
 using namespace std;
 
+#if defined(__linux__)
+    #define LINUX true 
+#elif defined(_WIN32)
+    #define LINUX false
+#endif
+
+
 bool  isZero(double a)
 {
     if((a<0.00001)&&-a<0.00001)
@@ -295,7 +303,8 @@ void loop()
                 menu();
             }
             else if(op == 6){
-                system("cls");
+                if(LINUX) system("clear");
+                else system("cls");
                 menu();
             }
             else if(op == 10){
diff --git a/project/polynomial/polynomial.py b/dataStructure/polynomial.py
similarity index 99%
rename from project/polynomial/polynomial.py
rename to dataStructure/polynomial.py
index 5695117..b536694 100644
--- a/project/polynomial/polynomial.py
+++ b/dataStructure/polynomial.py
@@ -166,8 +166,5 @@ def menu():
     print('10.menu')
     print('11.exit')
 
-def go():
-    menu()
-    
 if __name__ == '__main__':
-    go()
+    pass
diff --git a/dataStructure/segTree.cc b/dataStructure/segTree.cc
deleted file mode 100644
index c2b4ca1..0000000
--- a/dataStructure/segTree.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-/* mbinary
-#########################################################################
-# File : segTree.cc
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-05-19  23:06
-# Description:
-#########################################################################
-*/
-
-#include<stdio.h>
-template<class type>
-bool operator <(type x,type y){return x<y;}
-template<class type>
-class segTree
-{
-    int size;
-    type *p;
-public:
-    segTree(int n=1);
-    ~segTree();
-    void update(int i,type x);
-    type getMin(int a,int b){return find(a,b,1,size,1);}
-    type find(int a,int b,int i,int j,int);
-};
-template<class type >
-segTree<type>::segTree(int n):size(1)
-{
-    while(size<n)size*=2;
-    p = new type[2*size-1];
-    for (int i=0;i<2*size-1 ;++i )p[i]=MAX;
-}
-template<class type >
-segTree<type>::~segTree(){delete p;}
-template<class type>
-void segTree<type>::update(int i,type x)
-{
-    i+=size-1;
-    p[i]=x;
-    while(i!=0){
-        i/=2;
-        p[i]=p[i*2]<p[i*2+1]?p[i*2]:p[i*2+1];
-    }
-}
-template<class type>
-type segTree<type>::find(int a,int b,int i , int j,int k)
-{
-    if(b<i}}j<a)return MAX;// to implement
-    if (a<=i&&j<=b)return p[k];
-    type l= find(a,b,i,(i+j)/2,2*k);
-    type r= find(a,b,(i+j)/2+1,j,2*k+1);
-    return l>r ?l:r;
-}
diff --git a/dataStructure/stack/stack.cc b/dataStructure/stack/stack.cc
deleted file mode 100644
index 9d310df..0000000
--- a/dataStructure/stack/stack.cc
+++ /dev/null
@@ -1,115 +0,0 @@
-/* mbinary
-#########################################################################
-# File : stack.cc
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-04-26  10:33
-# Description:
-#########################################################################
-*/
-
-#include<malloc.h>
-#include<stdio.h>
-#include<vector>
-#define SZ 50
-using namespace std;
-template<typename type>
-class stack
-{
-    int capacity;
-    type *bottom,*top;
-  public:
-    stack(int n = SZ);
-    stack( stack &);
-    stack(int,type);
-    stack(vector<type> &);
-    type pop();
-    int cp();
-    void push(type);
-    bool empty();
-    type getTop();
-};
-template<typename type>
-stack<type>::stack(int n):capacity(n)
-{
-    bottom = new type[capacity+1];
-    top = bottom;
-}
-
-template<typename type>
-stack<type>::stack(int n,type x):capacity(n*2)
-{
-    bottom = new type[capacity+1];
-    top = bottom;
-    for(int i = 0;i<n;++i)*(++top) = x;
-}
-template<typename type>
-stack<type>::stack(vector<type> &vc):capacity (vc.size()*2)
-{
-    bottom = new type[capacity+1];
-    top = bottom;
-    for(int i = 0;i!=vc.size();++i){
-        push(vc[i]);
-    }
-}
-template<typename type>
-stack<type>::stack(stack &s):capacity(s.capacity)
-{
-    bottom = new type[capacity+1];
-    top = bottom;
-    for(type *p= s.bottom;p!=s.top;)*(++top) = *(++p);
-}
-template<typename type>
-int stack<type>::cp()
-{
-    return capacity;
-}
-template<typename type>
-bool stack<type>::empty()
-{
-    return bottom == top;
-}
-template<typename type>
-type stack<type>::getTop()
-{
-    return *top;
-}
-template<typename type>
-type stack<type>::pop()
-{
-    if(bottom == top){
-        printf("the stack is empty now\n");
-        return 0;
-    }else{
-        return *(top--);
-    }
-}
-template<typename type>
-void stack<type>::push(type x)
-{
-    if(capacity == top-bottom){
-        bottom = (type *)realloc(bottom,sizeof(type)*(2*capacity+1));
-        top = bottom+capacity;
-    }
-    *(++top) = x;
-}
-int main()
-{
-    stack<char> sc(5,'z'),scc(sc);
-    printf("stack copy\n");
-    while(!scc.empty()){
-        printf("%c\n",scc.pop());
-    }
-    vector<double> vc(50,2.3);
-    stack<double> sd(vc);
-    sd.push(3.4);
-    printf("gettop%lf\n",sd.getTop());
-    printf("vec copy\n");
-    while(!sd.empty()){
-        printf("%lf\n",sd.pop());
-    }
-    printf("empty %d\ncapacity%d",sd.empty(),sd.cp());
-    return 0;
-}
diff --git a/project/graph/graph.exe b/project/graph/graph.exe
deleted file mode 100644
index a402668..0000000
Binary files a/project/graph/graph.exe and /dev/null differ
diff --git a/project/huffman/huffman.aux b/project/huffman/huffman.aux
deleted file mode 100644
index 6646bae..0000000
--- a/project/huffman/huffman.aux
+++ /dev/null
@@ -1,38 +0,0 @@
-\relax 
-\@writefile{toc}{\contentsline {section}{\numberline {1}需求分析}{2}}
-\@writefile{toc}{\contentsline {paragraph}{1}{2}}
-\@writefile{toc}{\contentsline {paragraph}{2}{2}}
-\@writefile{toc}{\contentsline {paragraph}{3}{2}}
-\@writefile{toc}{\contentsline {paragraph}{4}{2}}
-\@writefile{toc}{\contentsline {paragraph}{5}{2}}
-\@writefile{toc}{\contentsline {section}{\numberline {2}概要设计}{2}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {2.1}结点node}{2}}
-\@writefile{toc}{\contentsline {paragraph}{数据对象}{2}}
-\@writefile{toc}{\contentsline {paragraph}{数据关系}{2}}
-\@writefile{toc}{\contentsline {paragraph}{基本操作}{2}}
-\@writefile{toc}{\contentsline {subparagraph}{node()}{2}}
-\@writefile{toc}{\contentsline {subparagraph}{node( const node\& nd}{2}}
-\@writefile{toc}{\contentsline {subparagraph}{operator<}{2}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {2.2}huffman树}{3}}
-\@writefile{toc}{\contentsline {paragraph}{数据对象}{3}}
-\@writefile{toc}{\contentsline {paragraph}{数据关系}{3}}
-\@writefile{toc}{\contentsline {paragraph}{基本操作}{3}}
-\@writefile{toc}{\contentsline {subparagraph}{huffman( map)}{3}}
-\@writefile{toc}{\contentsline {subparagraph}{encode(string)}{3}}
-\@writefile{toc}{\contentsline {subparagraph}{decode(string)}{3}}
-\@writefile{toc}{\contentsline {subparagraph}{preorder()}{3}}
-\@writefile{toc}{\contentsline {subparagraph}{display}{3}}
-\@writefile{toc}{\contentsline {section}{\numberline {3}详细设计}{3}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {3.1}编码，解码算法}{3}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {3.2}输出进度条}{7}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {3.3}改变文件名}{7}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {3.4}统计信息}{7}}
-\@writefile{toc}{\contentsline {section}{\numberline {4}调试分析}{8}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {4.1}编码信息的存储}{8}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {4.2}最后一个字节}{8}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {4.3}文件名的处理}{8}}
-\@writefile{toc}{\contentsline {section}{\numberline {5}用户手册}{8}}
-\@writefile{toc}{\contentsline {section}{\numberline {6}测试结果}{9}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {6.1}文本文件}{9}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {6.2}二进制文件1}{10}}
-\@writefile{toc}{\contentsline {subsection}{\numberline {6.3}二进制文件2}{11}}
diff --git a/project/huffman/huffman.exe b/project/huffman/huffman.exe
deleted file mode 100644
index 29d76f1..0000000
Binary files a/project/huffman/huffman.exe and /dev/null differ
diff --git a/project/huffman/huffman.log b/project/huffman/huffman.log
deleted file mode 100644
index c07827d..0000000
--- a/project/huffman/huffman.log
+++ /dev/null
@@ -1,1537 +0,0 @@
-This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live 2017/W32TeX) (preloaded format=pdflatex 2017.10.3)  11 NOV 2017 10:04
-entering extended mode
- restricted \write18 enabled.
- %&-line parsing enabled.
-**./huffman.tex
-(./huffman.tex
-LaTeX2e <2017-04-15>
-Babel <3.10> and hyphenation patterns for 84 language(s) loaded.
-(d:/applicatons/texlive/texmf-dist/tex/latex/ctex/ctexart.cls
-(d:/applicatons/texlive/texmf-dist/tex/latex/l3kernel/expl3.sty
-Package: expl3 2017/05/13 L3 programming layer (loader) 
-
-(d:/applicatons/texlive/texmf-dist/tex/latex/l3kernel/expl3-code.tex
-Package: expl3 2017/05/13 L3 programming layer (code)
-\c_max_int=\count79
-\l_tmpa_int=\count80
-\l_tmpb_int=\count81
-\g_tmpa_int=\count82
-\g_tmpb_int=\count83
-\g__prg_map_int=\count84
-\c_log_iow=\count85
-\l_iow_line_count_int=\count86
-\l__iow_line_target_int=\count87
-\l__iow_one_indent_int=\count88
-\l__iow_indent_int=\count89
-\c_zero_dim=\dimen102
-\c_max_dim=\dimen103
-\l_tmpa_dim=\dimen104
-\l_tmpb_dim=\dimen105
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-   defining Unicode char U+00A0 (decimal 160)
-   defining Unicode char U+00A1 (decimal 161)
-   defining Unicode char U+00A3 (decimal 163)
-   defining Unicode char U+00AB (decimal 171)
-   defining Unicode char U+00AD (decimal 173)
-   defining Unicode char U+00BB (decimal 187)
-   defining Unicode char U+00BF (decimal 191)
-   defining Unicode char U+00C0 (decimal 192)
-   defining Unicode char U+00C1 (decimal 193)
-   defining Unicode char U+00C2 (decimal 194)
-   defining Unicode char U+00C3 (decimal 195)
-   defining Unicode char U+00C4 (decimal 196)
-   defining Unicode char U+00C5 (decimal 197)
-   defining Unicode char U+00C6 (decimal 198)
-   defining Unicode char U+00C7 (decimal 199)
-   defining Unicode char U+00C8 (decimal 200)
-   defining Unicode char U+00C9 (decimal 201)
-   defining Unicode char U+00CA (decimal 202)
-   defining Unicode char U+00CB (decimal 203)
-   defining Unicode char U+00CC (decimal 204)
-   defining Unicode char U+00CD (decimal 205)
-   defining Unicode char U+00CE (decimal 206)
-   defining Unicode char U+00CF (decimal 207)
-   defining Unicode char U+00D0 (decimal 208)
-   defining Unicode char U+00D1 (decimal 209)
-   defining Unicode char U+00D2 (decimal 210)
-   defining Unicode char U+00D3 (decimal 211)
-   defining Unicode char U+00D4 (decimal 212)
-   defining Unicode char U+00D5 (decimal 213)
-   defining Unicode char U+00D6 (decimal 214)
-   defining Unicode char U+00D8 (decimal 216)
-   defining Unicode char U+00D9 (decimal 217)
-   defining Unicode char U+00DA (decimal 218)
-   defining Unicode char U+00DB (decimal 219)
-   defining Unicode char U+00DC (decimal 220)
-   defining Unicode char U+00DD (decimal 221)
-   defining Unicode char U+00DE (decimal 222)
-   defining Unicode char U+00DF (decimal 223)
-   defining Unicode char U+00E0 (decimal 224)
-   defining Unicode char U+00E1 (decimal 225)
-   defining Unicode char U+00E2 (decimal 226)
-   defining Unicode char U+00E3 (decimal 227)
-   defining Unicode char U+00E4 (decimal 228)
-   defining Unicode char U+00E5 (decimal 229)
-   defining Unicode char U+00E6 (decimal 230)
-   defining Unicode char U+00E7 (decimal 231)
-   defining Unicode char U+00E8 (decimal 232)
-   defining Unicode char U+00E9 (decimal 233)
-   defining Unicode char U+00EA (decimal 234)
-   defining Unicode char U+00EB (decimal 235)
-   defining Unicode char U+00EC (decimal 236)
-   defining Unicode char U+00ED (decimal 237)
-   defining Unicode char U+00EE (decimal 238)
-   defining Unicode char U+00EF (decimal 239)
-   defining Unicode char U+00F0 (decimal 240)
-   defining Unicode char U+00F1 (decimal 241)
-   defining Unicode char U+00F2 (decimal 242)
-   defining Unicode char U+00F3 (decimal 243)
-   defining Unicode char U+00F4 (decimal 244)
-   defining Unicode char U+00F5 (decimal 245)
-   defining Unicode char U+00F6 (decimal 246)
-   defining Unicode char U+00F8 (decimal 248)
-   defining Unicode char U+00F9 (decimal 249)
-   defining Unicode char U+00FA (decimal 250)
-   defining Unicode char U+00FB (decimal 251)
-   defining Unicode char U+00FC (decimal 252)
-   defining Unicode char U+00FD (decimal 253)
-   defining Unicode char U+00FE (decimal 254)
-   defining Unicode char U+00FF (decimal 255)
-   defining Unicode char U+0100 (decimal 256)
-   defining Unicode char U+0101 (decimal 257)
-   defining Unicode char U+0102 (decimal 258)
-   defining Unicode char U+0103 (decimal 259)
-   defining Unicode char U+0104 (decimal 260)
-   defining Unicode char U+0105 (decimal 261)
-   defining Unicode char U+0106 (decimal 262)
-   defining Unicode char U+0107 (decimal 263)
-   defining Unicode char U+0108 (decimal 264)
-   defining Unicode char U+0109 (decimal 265)
-   defining Unicode char U+010A (decimal 266)
-   defining Unicode char U+010B (decimal 267)
-   defining Unicode char U+010C (decimal 268)
-   defining Unicode char U+010D (decimal 269)
-   defining Unicode char U+010E (decimal 270)
-   defining Unicode char U+010F (decimal 271)
-   defining Unicode char U+0110 (decimal 272)
-   defining Unicode char U+0111 (decimal 273)
-   defining Unicode char U+0112 (decimal 274)
-   defining Unicode char U+0113 (decimal 275)
-   defining Unicode char U+0114 (decimal 276)
-   defining Unicode char U+0115 (decimal 277)
-   defining Unicode char U+0116 (decimal 278)
-   defining Unicode char U+0117 (decimal 279)
-   defining Unicode char U+0118 (decimal 280)
-   defining Unicode char U+0119 (decimal 281)
-   defining Unicode char U+011A (decimal 282)
-   defining Unicode char U+011B (decimal 283)
-   defining Unicode char U+011C (decimal 284)
-   defining Unicode char U+011D (decimal 285)
-   defining Unicode char U+011E (decimal 286)
-   defining Unicode char U+011F (decimal 287)
-   defining Unicode char U+0120 (decimal 288)
-   defining Unicode char U+0121 (decimal 289)
-   defining Unicode char U+0122 (decimal 290)
-   defining Unicode char U+0123 (decimal 291)
-   defining Unicode char U+0124 (decimal 292)
-   defining Unicode char U+0125 (decimal 293)
-   defining Unicode char U+0128 (decimal 296)
-   defining Unicode char U+0129 (decimal 297)
-   defining Unicode char U+012A (decimal 298)
-   defining Unicode char U+012B (decimal 299)
-   defining Unicode char U+012C (decimal 300)
-   defining Unicode char U+012D (decimal 301)
-   defining Unicode char U+012E (decimal 302)
-   defining Unicode char U+012F (decimal 303)
-   defining Unicode char U+0130 (decimal 304)
-   defining Unicode char U+0131 (decimal 305)
-   defining Unicode char U+0132 (decimal 306)
-   defining Unicode char U+0133 (decimal 307)
-   defining Unicode char U+0134 (decimal 308)
-   defining Unicode char U+0135 (decimal 309)
-   defining Unicode char U+0136 (decimal 310)
-   defining Unicode char U+0137 (decimal 311)
-   defining Unicode char U+0139 (decimal 313)
-   defining Unicode char U+013A (decimal 314)
-   defining Unicode char U+013B (decimal 315)
-   defining Unicode char U+013C (decimal 316)
-   defining Unicode char U+013D (decimal 317)
-   defining Unicode char U+013E (decimal 318)
-   defining Unicode char U+0141 (decimal 321)
-   defining Unicode char U+0142 (decimal 322)
-   defining Unicode char U+0143 (decimal 323)
-   defining Unicode char U+0144 (decimal 324)
-   defining Unicode char U+0145 (decimal 325)
-   defining Unicode char U+0146 (decimal 326)
-   defining Unicode char U+0147 (decimal 327)
-   defining Unicode char U+0148 (decimal 328)
-   defining Unicode char U+014A (decimal 330)
-   defining Unicode char U+014B (decimal 331)
-   defining Unicode char U+014C (decimal 332)
-   defining Unicode char U+014D (decimal 333)
-   defining Unicode char U+014E (decimal 334)
-   defining Unicode char U+014F (decimal 335)
-   defining Unicode char U+0150 (decimal 336)
-   defining Unicode char U+0151 (decimal 337)
-   defining Unicode char U+0152 (decimal 338)
-   defining Unicode char U+0153 (decimal 339)
-   defining Unicode char U+0154 (decimal 340)
-   defining Unicode char U+0155 (decimal 341)
-   defining Unicode char U+0156 (decimal 342)
-   defining Unicode char U+0157 (decimal 343)
-   defining Unicode char U+0158 (decimal 344)
-   defining Unicode char U+0159 (decimal 345)
-   defining Unicode char U+015A (decimal 346)
-   defining Unicode char U+015B (decimal 347)
-   defining Unicode char U+015C (decimal 348)
-   defining Unicode char U+015D (decimal 349)
-   defining Unicode char U+015E (decimal 350)
-   defining Unicode char U+015F (decimal 351)
-   defining Unicode char U+0160 (decimal 352)
-   defining Unicode char U+0161 (decimal 353)
-   defining Unicode char U+0162 (decimal 354)
-   defining Unicode char U+0163 (decimal 355)
-   defining Unicode char U+0164 (decimal 356)
-   defining Unicode char U+0165 (decimal 357)
-   defining Unicode char U+0168 (decimal 360)
-   defining Unicode char U+0169 (decimal 361)
-   defining Unicode char U+016A (decimal 362)
-   defining Unicode char U+016B (decimal 363)
-   defining Unicode char U+016C (decimal 364)
-   defining Unicode char U+016D (decimal 365)
-   defining Unicode char U+016E (decimal 366)
-   defining Unicode char U+016F (decimal 367)
-   defining Unicode char U+0170 (decimal 368)
-   defining Unicode char U+0171 (decimal 369)
-   defining Unicode char U+0172 (decimal 370)
-   defining Unicode char U+0173 (decimal 371)
-   defining Unicode char U+0174 (decimal 372)
-   defining Unicode char U+0175 (decimal 373)
-   defining Unicode char U+0176 (decimal 374)
-   defining Unicode char U+0177 (decimal 375)
-   defining Unicode char U+0178 (decimal 376)
-   defining Unicode char U+0179 (decimal 377)
-   defining Unicode char U+017A (decimal 378)
-   defining Unicode char U+017B (decimal 379)
-   defining Unicode char U+017C (decimal 380)
-   defining Unicode char U+017D (decimal 381)
-   defining Unicode char U+017E (decimal 382)
-   defining Unicode char U+01CD (decimal 461)
-   defining Unicode char U+01CE (decimal 462)
-   defining Unicode char U+01CF (decimal 463)
-   defining Unicode char U+01D0 (decimal 464)
-   defining Unicode char U+01D1 (decimal 465)
-   defining Unicode char U+01D2 (decimal 466)
-   defining Unicode char U+01D3 (decimal 467)
-   defining Unicode char U+01D4 (decimal 468)
-   defining Unicode char U+01E2 (decimal 482)
-   defining Unicode char U+01E3 (decimal 483)
-   defining Unicode char U+01E6 (decimal 486)
-   defining Unicode char U+01E7 (decimal 487)
-   defining Unicode char U+01E8 (decimal 488)
-   defining Unicode char U+01E9 (decimal 489)
-   defining Unicode char U+01EA (decimal 490)
-   defining Unicode char U+01EB (decimal 491)
-   defining Unicode char U+01F0 (decimal 496)
-   defining Unicode char U+01F4 (decimal 500)
-   defining Unicode char U+01F5 (decimal 501)
-   defining Unicode char U+0218 (decimal 536)
-   defining Unicode char U+0219 (decimal 537)
-   defining Unicode char U+021A (decimal 538)
-   defining Unicode char U+021B (decimal 539)
-   defining Unicode char U+0232 (decimal 562)
-   defining Unicode char U+0233 (decimal 563)
-   defining Unicode char U+1E02 (decimal 7682)
-   defining Unicode char U+1E03 (decimal 7683)
-   defining Unicode char U+200C (decimal 8204)
-   defining Unicode char U+2010 (decimal 8208)
-   defining Unicode char U+2011 (decimal 8209)
-   defining Unicode char U+2012 (decimal 8210)
-   defining Unicode char U+2013 (decimal 8211)
-   defining Unicode char U+2014 (decimal 8212)
-   defining Unicode char U+2015 (decimal 8213)
-   defining Unicode char U+2018 (decimal 8216)
-   defining Unicode char U+2019 (decimal 8217)
-   defining Unicode char U+201A (decimal 8218)
-   defining Unicode char U+201C (decimal 8220)
-   defining Unicode char U+201D (decimal 8221)
-   defining Unicode char U+201E (decimal 8222)
-   defining Unicode char U+2030 (decimal 8240)
-   defining Unicode char U+2031 (decimal 8241)
-   defining Unicode char U+2039 (decimal 8249)
-   defining Unicode char U+203A (decimal 8250)
-   defining Unicode char U+2423 (decimal 9251)
-   defining Unicode char U+1E20 (decimal 7712)
-   defining Unicode char U+1E21 (decimal 7713)
-)
-Now handling font encoding OT1 ...
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-   defining Unicode char U+00A0 (decimal 160)
-   defining Unicode char U+00A1 (decimal 161)
-   defining Unicode char U+00A3 (decimal 163)
-   defining Unicode char U+00AD (decimal 173)
-   defining Unicode char U+00B8 (decimal 184)
-   defining Unicode char U+00BF (decimal 191)
-   defining Unicode char U+00C5 (decimal 197)
-   defining Unicode char U+00C6 (decimal 198)
-   defining Unicode char U+00D8 (decimal 216)
-   defining Unicode char U+00DF (decimal 223)
-   defining Unicode char U+00E6 (decimal 230)
-   defining Unicode char U+00EC (decimal 236)
-   defining Unicode char U+00ED (decimal 237)
-   defining Unicode char U+00EE (decimal 238)
-   defining Unicode char U+00EF (decimal 239)
-   defining Unicode char U+00F8 (decimal 248)
-   defining Unicode char U+0131 (decimal 305)
-   defining Unicode char U+0141 (decimal 321)
-   defining Unicode char U+0142 (decimal 322)
-   defining Unicode char U+0152 (decimal 338)
-   defining Unicode char U+0153 (decimal 339)
-   defining Unicode char U+0174 (decimal 372)
-   defining Unicode char U+0175 (decimal 373)
-   defining Unicode char U+0176 (decimal 374)
-   defining Unicode char U+0177 (decimal 375)
-   defining Unicode char U+0218 (decimal 536)
-   defining Unicode char U+0219 (decimal 537)
-   defining Unicode char U+021A (decimal 538)
-   defining Unicode char U+021B (decimal 539)
-   defining Unicode char U+2013 (decimal 8211)
-   defining Unicode char U+2014 (decimal 8212)
-   defining Unicode char U+2018 (decimal 8216)
-   defining Unicode char U+2019 (decimal 8217)
-   defining Unicode char U+201C (decimal 8220)
-   defining Unicode char U+201D (decimal 8221)
-)
-Now handling font encoding OMS ...
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-   defining Unicode char U+00A7 (decimal 167)
-   defining Unicode char U+00B6 (decimal 182)
-   defining Unicode char U+00B7 (decimal 183)
-   defining Unicode char U+2020 (decimal 8224)
-   defining Unicode char U+2021 (decimal 8225)
-   defining Unicode char U+2022 (decimal 8226)
-)
-Now handling font encoding OMX ...
-... no UTF-8 mapping file for font encoding OMX
-Now handling font encoding U ...
-... no UTF-8 mapping file for font encoding U
-Now handling font encoding TS1 ...
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-
-(d:/applicatons/texlive/texmf-dist/tex/latex/base/ts1enc.dfu
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-   defining Unicode char U+00A2 (decimal 162)
-   defining Unicode char U+00A3 (decimal 163)
-   defining Unicode char U+00A4 (decimal 164)
-   defining Unicode char U+00A5 (decimal 165)
-   defining Unicode char U+00A6 (decimal 166)
-   defining Unicode char U+00A7 (decimal 167)
-   defining Unicode char U+00A8 (decimal 168)
-   defining Unicode char U+00A9 (decimal 169)
-   defining Unicode char U+00AA (decimal 170)
-   defining Unicode char U+00AC (decimal 172)
-   defining Unicode char U+00AE (decimal 174)
-   defining Unicode char U+00AF (decimal 175)
-   defining Unicode char U+00B0 (decimal 176)
-   defining Unicode char U+00B1 (decimal 177)
-   defining Unicode char U+00B2 (decimal 178)
-   defining Unicode char U+00B3 (decimal 179)
-   defining Unicode char U+00B4 (decimal 180)
-   defining Unicode char U+00B5 (decimal 181)
-   defining Unicode char U+00B6 (decimal 182)
-   defining Unicode char U+00B7 (decimal 183)
-   defining Unicode char U+00B9 (decimal 185)
-   defining Unicode char U+00BA (decimal 186)
-   defining Unicode char U+00BC (decimal 188)
-   defining Unicode char U+00BD (decimal 189)
-   defining Unicode char U+00BE (decimal 190)
-   defining Unicode char U+00D7 (decimal 215)
-   defining Unicode char U+00F7 (decimal 247)
-   defining Unicode char U+0192 (decimal 402)
-   defining Unicode char U+02C7 (decimal 711)
-   defining Unicode char U+02D8 (decimal 728)
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-/simsun.ttc><c:/WINDOWS/fonts/simhei.ttf><c:/WINDOWS/fonts/simsun.ttc><c:/WINDO
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-dist/fonts/type1/public/amsfonts/cm/cmti10.pfb><d:/applicatons/texlive/texmf-di
-st/fonts/type1/public/amsfonts/cm/cmtt10.pfb>
-Output written on huffman.pdf (11 pages, 591555 bytes).
-PDF statistics:
- 635 PDF objects out of 1000 (max. 8388607)
- 422 compressed objects within 5 object streams
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-
diff --git a/project/huffman/huffman.synctex.gz b/project/huffman/huffman.synctex.gz
deleted file mode 100644
index 7ec89b4..0000000
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diff --git a/project/navigation/__pycache__/directed.cpython-36.pyc b/project/navigation/__pycache__/directed.cpython-36.pyc
deleted file mode 100644
index 22e48c0..0000000
Binary files a/project/navigation/__pycache__/directed.cpython-36.pyc and /dev/null differ
diff --git a/project/navigation/directed.py b/project/navigation/directed.py
deleted file mode 100644
index 11d356f..0000000
--- a/project/navigation/directed.py
+++ /dev/null
@@ -1,155 +0,0 @@
-''' mbinary
-#########################################################################
-# File : directed.py
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-04-25  22:28
-# Description:
-#########################################################################
-'''
-
-from collections import deque
-class vertex:
-    def __init__(self,mark,val=None ,firstEdge = None):
-        self.mark = mark
-        self.val = val
-        self.firstEdge = firstEdge
-        self.isVisited = False
-    def __str__(self):
-        try:
-            int(self.mark)
-            return 'v'+str(self.mark)
-        except:return str(self.mark)
-    def __repr__(self):
-        li=[]
-        arc= self.firstEdge
-        while arc!=None:
-            li.append(arc)
-            arc= arc.outNextEdge
-        return str(self)+ '  to:'+str([str(i.inArrow) for i in li])
-class edge:
-    def __init__(self,outArrow,inArrow,outNextEdge = None,inNextEdge = None, weight = 1): 
-        self.weight = weight
-        self.inNextEdge = inNextEdge 
-        self.outNextEdge = outNextEdge
-        self.outArrow = outArrow
-        self.inArrow=inArrow
-        self.isVisited = False
-    def __str__(self):
-        return '--'+str(self.weight)+'-->'
-    def __repr__(self):
-        return str(self)
-class graph:
-    def __init__(self): 
-        self.vertexs = {}
-        self.edges = {}
-    def __getitem__(self,i): 
-        return self.vertexs[i]
-    def __setitem__(selfi,x):
-        self.vertexs[i]= x
-    def __iter__(self):
-        return iter(self.vertexs.values())
-    def __bool__(self):
-        return len(self.vertexs)!=0
-    def addVertex(self,i):
-        if  not (i,vertex) and  i not in self.vertexs:self.vertexs[i]= vertex(i)
-        if isinstance(i,vertex) and  i not in self.vertexs:self.vertexs[i.mark]= i
-    def isConnected(self,v,u):
-        v = self.__getVertex(v)
-        u = self.__getVertex(u)
-        arc= v.firstEdge
-        while arc!=None:
-            if arc.inArrow==u:return True
-            arc = arc.inNextEdge
-        return False
-    def __getVertex(self,v):
-        if not isinstance(v,vertex):
-            if v not in self.vertexs:
-                self.vertexs[v]=vertex(v)
-            return self.vertexs[v]
-        return v
-    def addEdge(self,v,u,weight = 1):
-        v = self.__getVertex(v)
-        u = self.__getVertex(u)
-        arc = v.firstEdge
-        while arc!=None:         #examine that if v,u have been already connected
-            if arc.inArrow==u: return
-            arc= arc.outNextEdge
-        newEdge = edge(v,u,v.firstEdge,u.firstEdge,weight)
-        self.edges[(v.mark,u.mark)] = newEdge
-        v.firstEdge = newEdge
-    def delEdge(self,v,u):
-        if not isinstance(v,vertex):v= self.vertexs[v]
-        if not isinstance(u,vertex):u= self.vertexs[u]
-        self._unrelated(v,u)
-        del self.edges[(v.mark,u.mark)]
-    def _unrelated(self,v,u):
-        if v.firstEdge==None:return 
-        if v.firstEdge.inArrow == u:
-            v.firstEdge =v.firstEdge.outNextEdge
-        else:
-            arc = v.firstEdge
-            while arc.outNextEdge!=None:
-                 if arc.outNextEdge.inArrow ==u:
-                     arc.outNextEdge = arc.outNextEdge.outNextEdge
-                     break
-    def reVisit(self):
-        for i in self.vertexs:
-            self.vertexs[i].isVisited=False
-        for i in self.edges:
-            self.edges[i].isVisited=False
-    def __str__(self):
-        arcs= list(self.edges.keys())
-        arcs=[str(i[0])+'--->'+str(i[1])+'  weight:'+str(self.edges[i].weight) for i in arcs]
-        s= '\n'.join(arcs)
-        return s
-    def __repr__(self):
-        return str(self)
-    def notIn(self,v):
-        if (isinstance(v,vertex) and  v.mark not in self.vertexs) or v not in self.vertexs:
-            return True
-        return False
-    def minPath(self,v,u):
-        '''dijstra'''
-        self.reVisit()
-        if self.notIn(v) or  self.notIn(u):
-            return  [],0
-        v = self.__getVertex(v)
-        u = self.__getVertex(u)
-        if v.firstEdge==None:return [],0
-        q=deque([v])
-        last = {i : None for i in self}
-        distance={i : 1<<30 for i in self}
-        distance[v]=0
-        while len(q)!=0:
-            cur= q.popleft()
-            cur.isVisited = True
-            arc = cur.firstEdge
-            while arc!=None:
-                to = arc.inArrow
-                if not to.isVisited:
-                    q.append(to)
-                    if distance [to] > distance[cur]+arc.weight:
-                        last[to]=cur
-                        distance[to] =distance[cur]+arc.weight
-                arc= arc.outNextEdge
-        cur = u
-        path=[]
-        while cur!=None and cur!=v:
-            path.append(cur.mark)
-            cur=last[cur]
-        if cur==None:return [], 0
-        path.append(v.mark)
-        return path[::-1],distance[u]
-    def hasVertex(self,mark):
-        return mark in self.vertexs
-    def display(self):
-        print('vertexs')
-        for i in self.vertexs:
-            print(self.vertexs[i].__repr__())
-        print('edges')
-        for i in self.edges:
-            arc=self.edges[i]
-            print(str(arc.outArrow)+str(arc)+str(arc.inArrow))
diff --git a/project/navigation/graph.py b/project/navigation/graph.py
deleted file mode 100644
index f84fb05..0000000
--- a/project/navigation/graph.py
+++ /dev/null
@@ -1,237 +0,0 @@
-''' mbinary
-#########################################################################
-# File : graph.py
-# Author: mbinary
-# Mail: zhuheqin1@gmail.com
-# Blog: https://mbinary.coding.me
-# Github: https://github.com/mbinary
-# Created Time: 2018-04-25  22:28
-# Description:
-#########################################################################
-'''
-
-from collections import deque
-import directed
-class vertex:
-    def __init__(self,mark,val=None):
-        self.mark = mark
-        self.val = val
-        self.edges = {}
-        self.isVisited = False
-    def __getitem__(self,adjVertexMark):
-        return self.edges[adjVertexMark]
-    def __delitem__(self,k):
-        del self.edges[k]
-    def __iter__(self):
-        return iter(self.edges.values())
-    def __str__(self):
-        try:
-            int(self.mark)
-            return 'v'+str(self.mark)
-        except:return str(self.mark)
-    def __repr__(self):
-        return str(self)
-class edge:
-    def __init__(self,adjVertexs, weight = 1):
-        '''adjVertexs:tuple(v.mark,u.mark)'''
-        self.weight = weight
-        self.adjVertexs = adjVertexs
-        self.isVisted = False
-    def __add__(self,x):
-        return self.weight +x
-    def __radd__(self,x):
-        return self+x
-    def __getitem__(self,k):
-        if k!=0 or k!=1:raise IndexError
-        return self.adjVertexs[k]
-    def __str__(self):
-        return '--'+str(self.weight)+'--'
-    def __repr__(self):
-        return str(self)
-    @property
-    def v(self):
-        return self.adjVertexs[0]
-    @property
-    def u(self):
-        return self.adjVertexs[1]
-class graph:
-    def __init__(self): 
-        self.vertexs = {}
-        self.edges = {}
-    def __getitem__(self,i): 
-        return self.vertexs[i]
-    def __setitem__(selfi,x):
-        self.vertexs[i]= x
-    def __iter__(self):
-        return iter(self.vertexs)
-    def __bool__(self):
-        return len(self.vertexs)!=0
-    def addVertex(self,v):
-        if  not isinstance(v,vertex) and  v not in self.vertexs:self.vertexs[v]= vertex(v)
-        if isinstance(v,vertex) and v not in self.vertexs:self.vertexs[v.mark]= v
-
-    def __getVertex(self,v):
-        if not isinstance(v,vertex):
-            if v not in self.vertexs:
-                self.vertexs[v]=vertex(v)
-            return self.vertexs[v]
-        return v
-    def addEdge(self,v,u,weight = 1):
-        v = self.__getVertex(v)
-        u = self.__getVertex(u)
-        for arc in v:
-            if  u in arc.adjVertexs:return  #examine that if v,u have been already connected
-        vertexs = (v,u)
-        newEdge = edge (vertexs,weight)
-        self.edges[vertexs] = newEdge
-        v.edges[u] = newEdge
-        u.edges[v] = newEdge        
-    def delEdge(self,v,u):
-        if not isinstance(v,vertex):v= self.vertexs[v]
-        if not isinstance(u,vertex):u= self.vertexs[u]
-        try:
-            del v[u]
-            del u[v]
-        except:print("error!"+str(v)+','+str(u)+' arent adjacent now')
-        del self.edges[(v,u)]       
-    def reVisit(self):
-        for i in self.vertexs.values():
-            i.isVisited = False
-        for i in self.edges.values():
-            i.isVisited = False
-    def __str__(self):
-        arcs= list(self.edges.keys())
-        arcs=[str(i[0])+str(self.edges[i])+str(i[1]) for i in arcs]
-        s= '\n'.join(arcs)
-        return s
-    def __repr__(self):
-        return str(self)
-    def minPath(self,v,u):
-        self.reVisit()
-        v=self.__getVertex(v)
-        u=self.__getVertex(u)
-        q=deque([v])
-        last={i:None for i in self.vertexs.values()}
-        last[v] = 0
-        ds={i:1<<30 for i in self.vertexs.values()}
-        ds[v]=0
-        while len(q)!=0:
-            nd = q.popleft()
-            nd.isVisited=True
-            for edge  in nd:
-                tgt=None
-                if edge.v==nd:
-                    tgt = edge.u
-                else:tgt = edge.v
-                tmp=ds[nd]+edge
-                if ds[tgt] >tmp:
-                    ds[tgt]=tmp
-                    last[tgt] = nd
-                if not tgt.isVisited:q.append(tgt)
-        path=[]
-        cur = u
-        while cur !=None and cur.mark!=v.mark:
-            path.append(cur.mark)
-            cur = last[cur]
-        if cur==None:return [],-1
-        path.append(v.mark)
-        return path[::-1],ds[u]
-    def hasCircle(self):
-        pass
-    def display(self):
-        print('vertexs')
-        for i in self.vertexs:
-            print(i,end=' ')
-        print('')
-        print('edges')
-        for i in self.edges:
-            arc=self.edges[i]
-            print(str(arc.v)+str(arc)+str(arc.u))
-
-def loop(dic):
-    while True:
-        print('input vertexs to get the min distance, input \'exit\' to exit')
-        s=input().strip()
-        if s=='exit':break
-        s=s.split(' ')
-        s=[dic[i] if '0'<=i[0]<='9' else i for i in s]
-        a,b,c=s[0],s[1],None
-        path,d = g.minPath(a,b)
-        path2=None
-        if len(s)==3:
-            c=s[2]
-            path2,d2=g.minPath(b,c)
-            d+=d2
-        if path==[] or path2==[] :
-            if len(s)==3: print(a+' can\'t reach '+c+' via '+b)
-            else: print(a+'  can\'t reach '+b)
-            continue
-        if path2!=None:path+=path2[1:]
-        print('distance : ',d)
-        print('path','-->'.join(path))
-
-
-if __name__ =='__main__':
-    s=input('1. undireted\n2. directed\n')
-    flag=input('name vertex by 1. num(1-index) or 2. string?   ').strip()
-    dic={}
-    g = graph()
-    if s=='2': g=directed.graph()
-    v,e=input('input vertex num & edge num: ').strip().split(' ')
-    v,e=int(v),int(e)
-    if flag=='1':
-        for i in range(v):
-            tmp=str(i+1)
-            dic[tmp]=tmp
-            g.addVertex(tmp)
-    else:
-        print('input vertex name line by line')  
-        for i in range(v):
-            dic[str(i+1)]=input().strip()
-            g.addVertex(dic[str(i+1)])
-    print('input edge info line by line')        
-    for i in range(e):
-        li=input().strip().split(' ')
-        a,b,w=li[0],li[1],1
-        if len(li)==3:w=int(li[2])
-        a,b=dic[a],dic[b]
-        g.addEdge(a,b,w)
-    print('you\'ve build graph :')
-    g.display()
-    loop(dic)
-'''
-6 6
-1 2 5
-1 3 1
-2 6 1
-2 5 1
-4 5 2
-3 4 1
-1 5
-'''
-
-'''
-6 10
-NewYork
-LA
-BeiJing
-HeFei
-SiChuan
-Paris
-2 1
-5 3
-6 1
-3 1
-4 4
-1 3
-2 1
-5 1
-2 4
-3 4
-SiChuan NewYork
-Paris HeFei
-V4<---V3<---V2<---V1
-3
-V4<---V3<---V2
-2
-'''
diff --git a/project/navigation/lab4_朱河勤_PB16030899.zip b/project/navigation/lab4_朱河勤_PB16030899.zip
deleted file mode 100644
index e2d40c1..0000000
Binary files a/project/navigation/lab4_朱河勤_PB16030899.zip and /dev/null differ
diff --git a/project/polynomial/polynomial.exe b/project/polynomial/polynomial.exe
deleted file mode 100644
index 9ca2c24..0000000
Binary files a/project/polynomial/polynomial.exe and /dev/null differ
diff --git a/tree_link.py b/tree_link.py
deleted file mode 100644
index b31637d..0000000
--- a/tree_link.py
+++ /dev/null
@@ -1,41 +0,0 @@
-# coding: utf-8
-import os
-import argparse
-
-#命令行输入参数处理
-parser = argparse.ArgumentParser()
-
-parser.add_argument('-p','--path',default='.')     
-parser.add_argument('-f','--fileinclude',default=False)     
-parser.add_argument('-d','--depth', type = int, default = 2)
-#获取参数
-args = parser.parse_args()
-FILE = args.fileinclude
-PATH = args.path
-DEPTH = args.depth
-
-
-def mklink(path):
-    return '* [{name}]({path})'.format(name=os.path.basename(path),path=path)
-def clean(paths):
-    ret = []
-    for path in paths:
-        name = os.path.basename(path)
-        if not ( name.startswith('.') or name.startswith('__')):
-            ret.append(path)
-    return ret
-
-def tree(path='.',depth=2):
-    li = os.listdir(path) if os.path.isdir(path) else [path]
-    items = [os.path.join(path,i) for i in li if not i.startswith('.')]
-    items = clean(items)
-    if not FILE: items = [i for i in items if os.path.isdir(i)]
-    if depth==1:
-        return [mklink(path)] + [' '*4 + mklink(i) for i in items]
-    else:
-        uls = [tree(i,depth-1) for i in items]
-        return  [mklink(path)] + [' '*4 + li for ul in uls for li in ul]
-
-
-if __name__ =='__main__':
-    print('\n'.join(tree(PATH,DEPTH)))