diff --git a/HDOJ/1061_autoAC.cpp b/HDOJ/1061_autoAC.cpp
new file mode 100644
index 0000000..a5ca9db
--- /dev/null
+++ b/HDOJ/1061_autoAC.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include <stdio.h>
+using namespace std;
+bool l[10];
+int r[10];
+int main()
+{
+    int t;
+    while(cin>>t)
+    {
+        while(t--)
+        {
+            memset(l,0,sizeof(l));
+            memset(r,0,sizeof(r));
+            unsigned long n;
+            cin>>n;
+            int a=n%10;
+            int b=a;
+            int i=1;
+            l[b]=true;r[0]=b;
+            b=(b*a)%10;
+            while(!l[b])
+            {
+                l[b]=true;
+                r[i++]=b;
+                b=(b*a)%10;
+            }
+            cout<<r[(n-1)%i]<<endl;
+        }
+    }
+    return 0;
+}
diff --git a/HDOJ/1062_autoAC.cpp b/HDOJ/1062_autoAC.cpp
new file mode 100644
index 0000000..fce944c
--- /dev/null
+++ b/HDOJ/1062_autoAC.cpp
@@ -0,0 +1,42 @@
+#include<iostream>
+#include<string.h>
+#include<stdio.h>
+using namespace std;
+const int Max = 1000 + 10;
+char str[Max];
+char w[Max];
+int main()
+{
+    int cases;
+    cin >> cases;
+    char c = getchar();
+    while(cases--)
+    {
+        gets(str);
+        int pos = 0;
+        int len = strlen(str);
+        for(int i=0; i<=len; i++)
+        {
+            if(str[i] == ' ')
+            {
+                w[pos++] = '\0';
+                strrev(w);
+                printf("%s ", w);
+                pos = 0;
+            }
+            else if(str[i] == '\0')
+            {
+                w[pos++] = '\0';
+                strrev(w);
+                printf("%s", w);
+                pos = 0;
+            }
+            else
+            {
+                w[pos++] = str[i];
+            }
+        }
+        printf("\n");
+    }
+    return 0;
+}
diff --git a/HDOJ/1063_autoAC.cpp b/HDOJ/1063_autoAC.cpp
new file mode 100644
index 0000000..ea8cb67
--- /dev/null
+++ b/HDOJ/1063_autoAC.cpp
@@ -0,0 +1,76 @@
+#include <iostream>
+using namespace std;
+const int MAX_LEN=1000;
+int temp[1000];
+void mul(char* z,char* x,char* y)
+{
+    int lenx=strlen(x);
+    int leny=strlen(y);
+    int i,j;
+    memset(temp,0,1000*4);
+    for(i=0;i<lenx;i++)
+        for(j=0;j<leny;j++)
+            temp[i+j]+=(x[lenx-1-i]-'0')*(y[leny-1-j]-'0');
+    memset(z,0,1000);
+    for(i=0;(i<lenx+leny-1) || temp[i]>9;i++)
+    {
+        if(temp[i]>9)
+            temp[i+1]+=temp[i]/10;
+        z[i]=temp[i]%10+'0';
+    }
+    z[i]=temp[i]+'0';
+    z[i+1]=0;
+    while(z[i]=='0' && i)
+        z[i--]=0;
+    _strrev(z);
+}
+int main()
+{
+    char t[1000];
+    char s[7];
+    int i,n,dot,len,integer;
+    while(cin>>s>>n)
+    {
+        dot=-1;
+        integer=0;
+        for(i=0;i<6;i++)
+            if(s[i]=='.')
+            {
+                dot=i;
+                for(;i<6;i++)
+                {
+                    s[i]=s[i+1];
+                    if(s[i]==0)
+                        break;
+                }
+                while(s[--i]=='0' && i>=dot)
+                    s[i]=0;
+                dot=strlen(s)-dot;
+                if(dot==0)
+                    integer=1;
+                break;
+            }
+        if(dot==-1)
+            integer=1;
+        memset(t,0,1000);
+        t[0]='1';
+        for(i=0;i<n;i++)
+            mul(t,t,s);
+        len=int(strlen(t))-dot*n;
+        if(integer)
+            cout<<t<<endl;
+        else if(len>0)
+        {
+            for(i=0;i<len;i++)
+                cout<<t[i];
+            cout<<'.'<<t+len<<endl;
+        }
+        else
+        {
+            cout<<'.';
+            for(i=0;i<-len;i++)
+                cout<<'0';
+            cout<<t<<endl;
+        }
+    }
+}
diff --git a/HDOJ/1064_autoAC.cpp b/HDOJ/1064_autoAC.cpp
new file mode 100644
index 0000000..809611e
--- /dev/null
+++ b/HDOJ/1064_autoAC.cpp
@@ -0,0 +1,14 @@
+#include<stdio.h>
+int main()
+{
+    double avg,cache;
+    int i;
+    avg=cache=0;
+    for(i=0;i<12;i++)
+    {
+        scanf("%lf",&cache);
+        avg+=cache;
+    }
+    printf("$%.2lf\n",avg/12);
+    return 0;
+}
diff --git a/HDOJ/1065_autoAC.cpp b/HDOJ/1065_autoAC.cpp
new file mode 100644
index 0000000..88f8691
--- /dev/null
+++ b/HDOJ/1065_autoAC.cpp
@@ -0,0 +1,17 @@
+#include<iostream>
+#include<math.h>
+#define PI 3.1415926
+using namespace std;
+int main(){
+    int m;
+    double x, y;
+    cin>>m;
+    for(int i = 0; i < m; i++){
+        cin>>x>>y;
+        double s = PI * (x * x + y * y);
+        int count = s / 100 + 1;
+        cout<<"Property "<<i + 1<<
+            ": This property will begin eroding in year "<<count<<"."<<endl;
+    }
+    cout<<"END OF OUTPUT."<<endl;
+}
diff --git a/HDOJ/1066_autoAC.cpp b/HDOJ/1066_autoAC.cpp
new file mode 100644
index 0000000..5bbcd9c
--- /dev/null
+++ b/HDOJ/1066_autoAC.cpp
@@ -0,0 +1,43 @@
+#include <cstdio>
+#include <cstring>
+#include <iostream>
+using namespace std;
+const int Lib[4]={6,2,4,8};  
+const int fact[10]={1,1,2,6,4,2,2,4,2,8};  
+char s[200];
+int a[200];  
+void todigit(char s[],int a[])
+{
+    a[2]=0;
+    a[0]=strlen(s);
+    for (int i=0; i<a[0]; i++) a[a[0]-i]=s[i]-'0';
+}
+void mult(int a[],int x) 
+{  
+    int j=0;
+    for (int i=a[0]; i>0; i--)
+    {
+        int k1=(j*10+a[i])/x;
+        j=(j*10+a[i])%x;
+        a[i]=k1;
+    }
+    while (a[0]>1 && a[a[0]]==0) a[0]--;
+}
+int last_nunzero(int a[])
+{
+    if (a[0]==1) return fact[a[1]];
+    int x1=fact[a[1]%5];               
+    mult(a,5);
+    int x2=Lib[(a[2]*10+a[1])%4];     
+    int ret=(x1*x2*last_nunzero(a))%10; 
+    return ret;
+}
+int main()
+{
+    while (gets(s))
+    {
+        todigit(s,a);
+        printf("%d\n",last_nunzero(a));
+    }
+    return 0;
+}
diff --git a/HDOJ/1067_autoAC.cpp b/HDOJ/1067_autoAC.cpp
new file mode 100644
index 0000000..0bd50e8
--- /dev/null
+++ b/HDOJ/1067_autoAC.cpp
@@ -0,0 +1,143 @@
+#include<stdio.h>
+#include<iostream>
+#include<algorithm>
+#include<string.h>
+#include<queue>
+#define ll __int64
+#define MAX 1000009
+using namespace std;
+ll has[1000009];
+ll b[4][8],op[32];
+ll endval,start;
+struct lmx{
+    ll arr[4][8];
+    ll  val;
+    ll step;
+    ll blankx[4];
+    ll blanky[4];
+};
+ll a[4][8]=
+{
+   {11,12,13,14,15,16,17},
+   {21,22,23,24,25,26,27},
+   {31,32,33,34,35,36,37},
+   {41,42,43,44,45,46,47}
+};
+ll _cnt(ll c[][8])
+{
+    ll s=0,i,j;
+    for(i=0;i<4;i++)
+    {
+        for(j=0;j<8;j++)
+        {
+            s+=c[i][j]*op[8*i+j];
+        }
+    }
+    return s;
+}
+void exchange(ll c[][8])
+{
+    ll i,j;
+    for(i=0;i<4;i++)
+    {
+        for(j=1;j<8;j++)
+        {
+            if(c[i][j]==11)      swap(c[0][0],c[i][j]);
+            else if(c[i][j]==21) swap(c[1][0],c[i][j]);
+            else if(c[i][j]==31) swap(c[2][0],c[i][j]);
+            else if(c[i][j]==41) swap(c[3][0],c[i][j]);
+        }
+    }
+}
+bool ihash(ll val)
+{
+    ll p=val%MAX;
+    while(has[p]!=-1&&has[p]!=val)
+    {
+        p=(p+20)%MAX;
+    }
+    if(has[p]==-1){has[p]=val;return true;}
+    return false;
+}
+void input()
+{
+    int i,j;
+    for(i=0;i<4;i++)
+    {
+      for(j=1;j<8;j++)
+      {
+        scanf("%I64d",&b[i][j]);
+      }
+      b[i][0]=0;
+    }
+}
+lmx s,h,t;
+queue<lmx> q;
+ll bfs()
+{
+    ll i,j,cnt=0,k,f=0,v,pos1,pos2,xx,yy;
+   if(start==endval) return 0;
+    while(!q.empty()) q.pop();
+    for(i=0;i<4;i++)
+    {
+        for(j=0;j<8;j++)
+        {
+            if(b[i][j]==0) {s.blankx[cnt]=i;s.blanky[cnt]=j;cnt++;}
+        }
+    }
+    memcpy(s.arr,b,sizeof(b));
+    s.step=0;
+    s.val=_cnt(b);
+    has[s.val%MAX]=s.val;
+    q.push(s);
+    while(!q.empty())
+    {
+        h=q.front();
+        q.pop();
+        for(i=0;i<4;i++)
+        {
+            t=h;
+            xx=h.blankx[i];
+            yy=h.blanky[i];
+            for(j=0;j<4;j++)
+            {
+                for(k=0;k<8;k++)
+                {
+                   if(h.arr[xx][yy-1]+1==h.arr[j][k])
+                   {
+                       pos1=j;pos2=k;
+                        swap(t.arr[pos1][pos2],t.arr[xx][yy]);
+                    v=_cnt(t.arr);
+                    t.blankx[i]=pos1;
+                    t.blanky[i]=pos2;
+                    if(ihash(v))
+                    {
+                        t.step=h.step+1;
+                        t.val=v;
+                        if(v==endval) return t.step;
+                        q.push(t);
+                    }
+                   }
+                }
+            }
+        }
+    }
+    return -1;
+}
+int main()
+{
+    ll i,j,n;
+    scanf("%I64d",&n);
+    op[0]=2;
+    for(i=1;i<32;i++) op[i]=op[i-1]<<1;
+    while(n--)
+    {
+        input();
+        exchange(b);
+        endval=_cnt(a);
+        start=_cnt(b);
+        memset(has,-1,sizeof(has));
+        printf("%I64d\n",bfs());
+    }
+    return 0;
+}
diff --git a/HDOJ/1068_autoAC.cpp b/HDOJ/1068_autoAC.cpp
new file mode 100644
index 0000000..2184e4a
--- /dev/null
+++ b/HDOJ/1068_autoAC.cpp
@@ -0,0 +1,45 @@
+#include <iostream>
+using namespace std;
+const int MAX = 500;
+bool visited[MAX];
+bool linked[MAX][MAX];
+int arossPath[MAX];
+int n;
+bool search(int u) {
+    for (int i = 0; i < n; i++) {
+        if (!visited[i]&& linked[i][u]) {
+            visited[i] = true;
+            if (arossPath[i] == -1 || search(arossPath[i])) {
+                arossPath[i] = u;
+                return true;
+            }
+        }
+    }
+    return false;
+}
+int maxMatch() {
+    int count = 0;
+    memset(arossPath, -1, sizeof(arossPath));
+    for (int i = 0; i < n; i++) {
+        memset(visited, false, sizeof(visited));
+        if (search(i))
+            count++;
+    }
+    return count;
+}
+int main()
+{
+    int k, a, b;
+    while (scanf("%d", &n) != EOF) {
+        memset(linked, false, sizeof(linked));
+        for (int i = 0; i < n; i++) {
+            scanf("%d: (%d)", &a, &k);
+            while (k--) {
+                scanf("%d", &b);
+                linked[a][b] = true;
+            }
+        }
+        cout << (n - maxMatch()/2) << endl;
+    }
+    return 0;
+}
diff --git a/HDOJ/1069_autoAC.cpp b/HDOJ/1069_autoAC.cpp
new file mode 100644
index 0000000..09438d8
--- /dev/null
+++ b/HDOJ/1069_autoAC.cpp
@@ -0,0 +1,58 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+typedef struct{
+    int x;
+    int y;
+    int z;
+}block;
+block blocks[100];
+int dp[100];
+int cmp(const void *a, const void *b)
+{
+    return (*(block*)a).x * (*(block*)a).y - (*(block*)b).x * (*(block*)b).y;
+}
+int isFeasible(const block a, const block b)
+{
+    if((a.x>b.x && a.y>b.y) || (a.x>b.y && a.y>b.x)){
+        return 1;
+    }
+    else{
+        return 0;
+    }
+}
+int main()
+{
+    int n, i, j;
+    int x, y, z;
+    int cas, max;
+    cas = 0;
+    while(scanf("%d", &n)!=EOF && n!=0){
+        cas++;
+        for(i=0; i<3*n; i++){
+            scanf("%d%d%d", &x, &y, &z);
+            blocks[i].x = x; blocks[i].y = y; blocks[i].z = z; i++;
+            blocks[i].x = y; blocks[i].y = z; blocks[i].z = x; i++;
+            blocks[i].x = z; blocks[i].y = x; blocks[i].z = y;
+        }
+        qsort(blocks, 3*n, sizeof(block), cmp);
+        memset(dp, 0, sizeof(dp));
+        dp[0] = blocks[0].z;
+        max = dp[0];
+        for(i=1; i<3*n; i++){
+            dp[i] = blocks[i].z;
+            for(j=i-1; j>=0; j--){
+                if(isFeasible(blocks[i], blocks[j])){
+                    if(dp[i] < dp[j] + blocks[i].z){
+                        dp[i] = dp[j] + blocks[i].z;
+                    }
+                }
+            }
+            if(dp[i] > max){
+                max = dp[i];
+            }
+        }
+        printf("Case %d: maximum height = %d\n", cas, max);
+    }
+    return 0;
+}
diff --git a/HDOJ/1070_autoAC.cpp b/HDOJ/1070_autoAC.cpp
new file mode 100644
index 0000000..b7ee72e
--- /dev/null
+++ b/HDOJ/1070_autoAC.cpp
@@ -0,0 +1,42 @@
+#include <iostream>
+#include <string>
+using namespace std;
+int main()
+{
+ int T, n, money, v, day;
+ int vmin;
+ double imin, temp;
+ string brand, strmin;
+ cin >> T;
+ while (T--) {
+  cin >> n;
+  imin = -1.0;
+  vmin = -1;
+  while (n--) {
+   cin >> brand >> money >> v;
+   if (v < 200) continue;
+   else {
+    day = (v >= 1000) ? 5 : v / 200;
+    temp = money*1.0/day;
+    if (imin == -1.0) {
+     imin = money*1.0/day;
+     vmin = v;
+     strmin = brand;
+    }
+    if (temp < imin) {
+     strmin = brand;
+     imin = money*1.0/day;
+     vmin = v;
+    }
+    else if (temp-imin > -0.000001 && temp-imin < 0.000001) {
+     if (vmin < v) {
+      strmin = brand;
+      vmin = v;
+     }
+    }
+   }
+  }
+  cout << strmin << endl;
+ }
+ return 0;
+}