diff --git a/CDOJ/594.cpp b/CDOJ/594.cpp
new file mode 100644
index 0000000..9310c91
--- /dev/null
+++ b/CDOJ/594.cpp
@@ -0,0 +1,71 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+
+#define MAXN 50100
+#define MAXH 110
+#define MAXVAL_H 100
+#define INF 0x3f3f3f3f
+
+int dp[2][MAXH];
+int bus[MAXH];
+
+int main()
+{
+    int N,C;
+    while(scanf("%d %d",&N,&C)==2)
+    {
+        /// Main Loop
+        int x;
+        scanf("%d",&x);
+        int index=0;
+        ///由于人无法变矮，因此这部分的花费记为INF
+        for(int i=0;i<x;i++) dp[index][i]=INF;
+        ///大于等于x的时候可以内增高呀！
+        for(int i=x;i<=MAXVAL_H;i++) dp[index][i]=(i-x)*(i-x);
+        N--;
+        while(N--)
+        {
+            ///登记一个新的身高x
+            scanf("%d",&x);
+            index=!index;///反转index(复用dp空间)
+            int begin=0;
+            int end=0;
+            /// 单调队列 方向: 小(0) --> 大(N)
+            for(int k=0;k<=MAXVAL_H;k++)
+            {
+                int cost=dp[!index][k]-k*C;
+                /// Pop Back
+                while(begin<end&& bus[end-1] > cost) end--;
+                /// Push Back
+                bus[end++]=cost;
+                if(k<x) {dp[index][k]=INF;}
+                ///队列最前面是值最小的
+                else {dp[index][k]=bus[begin]+k*C+(k-x)*(k-x);}
+            }
+            /// Empty
+            begin=end=0;
+            for(int k=MAXVAL_H;k>=0;k--)
+            {
+                int cost=dp[!index][k]+k*C;
+                /// Pop Back
+                while(begin<end&&bus[end-1] > cost) end--;
+                /// Push Back
+                bus[end++]=cost;
+                if(k>=x)
+                {
+                    dp[index][k]=min(dp[index][k],bus[begin]-k*C+(k-x)*(k-x));
+                }
+            }
+        }
+        int ans=INF;
+        for(int i=0;i<=MAXVAL_H;i++)
+        {
+            ans=min(dp[index][i],ans);
+        }
+        printf("%d\n",ans);
+    }
+    return 0;
+}
diff --git a/CDOJ/594_ka200812.cpp b/CDOJ/594_ka200812.cpp
new file mode 100644
index 0000000..f25789f
--- /dev/null
+++ b/CDOJ/594_ka200812.cpp
@@ -0,0 +1,62 @@
+#include<iostream>
+#include<string>
+#include<stdio.h>
+#include<memory.h>
+using namespace std;
+#define inf 0xfffffff
+#define min(a,b) a<b?a:b
+#define max(a,b) a>b?a:b
+
+int dp[2][101];
+int n,c;
+int q[101];
+int head,tail,cur;
+
+int main()
+{
+    int i,j,x,nowf;
+    //freopen("D:\\in.txt","r",stdin);
+    while(scanf("%d%d",&n,&c)==2)
+    {
+        scanf("%d",&x);
+        cur=0;
+        for(i=0;i<x;i++)
+            dp[cur][i]=inf;
+        for(i=x;i<=100;i++)
+            dp[cur][i]=(x-i)*(x-i);
+        for(i=1;i<n;i++)
+        {
+            scanf("%d",&x);
+            cur=1-cur;
+            //比前一个人高
+            head=tail=0;
+            for(j=0;j<=100;j++) //当身高为j时候，队列里便已经保存了0~j-1的信息，注意，是第i-1个人的信息
+            {
+                nowf=dp[1-cur][j]-j*c;
+                while(head<tail && q[tail-1]>nowf)
+                    tail--;
+                q[tail++]=nowf;
+                if(j<x)
+                    dp[cur][j]=inf;
+                else
+                    dp[cur][j]=q[head]+j*c+(x-j)*(x-j);
+            }
+            //比前一个人矮
+            head=tail=0;
+            for(j=100;j>=0;j--) //当身高为j时候，队列里便已经保存了100~j+1的信息，正写反写是有技巧的
+            {
+                nowf=dp[1-cur][j]+j*c;
+                while(head<tail && q[tail-1]>nowf)
+                    tail--;
+                q[tail++]=nowf;
+                if(j>=x)
+                    dp[cur][j]=min(dp[cur][j],q[head]-j*c+(x-j)*(x-j));
+            }
+        }
+        int ans=inf;
+        for(i=0;i<=100;i++)
+            ans=min(ans,dp[cur][i]);
+        printf("%d\n",ans);
+    }
+    return 0;
+}
diff --git a/CDOJ/Readme.md b/CDOJ/Readme.md
new file mode 100644
index 0000000..7350ed6
--- /dev/null
+++ b/CDOJ/Readme.md
@@ -0,0 +1,4 @@
+#CDOJ 
+*CDOJ is a UESTC Online Judge*  
+
+[CDOJ Home Page](http://acm.uestc.edu.cn/ "Welcome to CDOJ")  
diff --git a/HDOJ/3401_acm_ted.cpp b/HDOJ/3401_acm_ted.cpp
new file mode 100644
index 0000000..5f288b3
--- /dev/null
+++ b/HDOJ/3401_acm_ted.cpp
@@ -0,0 +1,66 @@
+#include<cstdio>
+#include<cstring>
+using namespace std;
+#define MAX 2005
+#define inf 0xfffff
+#define max(a,b) ((a)>(b)?(a):(b))
+int T,MaxP,W;
+int APi[MAX],BPi[MAX],ASi[MAX],BSi[MAX];
+int dp[MAX][MAX];//dp[i][j]第i天持有j股的最大值
+//dp[i][j]=max{dp[i-1][j],max{dp[r][k]-APi[i]*(j-k)}(0<r<i-w,k<j),max{dp[r][k]+BPi[i]*(k-j)}(0<r<i-w,k>j)}
+struct node
+{
+    int x;//存dp[i-w-1][k]+APi[i]*k或dp[i-w-1][k]+BPi[i]*k
+    int p;//当前持股数
+} q[2005],temp;
+int front,back;
+int main()
+{
+    int cas;
+    scanf("%d",&cas);
+    for(; cas--;)
+    {
+        scanf("%d%d%d",&T,&MaxP,&W);
+        for(int i=1; i<=T; ++i)
+            scanf("%d%d%d%d",APi+i,BPi+i,ASi+i,BSi+i);
+        for(int i=0; i<=T; ++i)
+            for(int j=0; j<=MaxP; ++j)
+                dp[i][j]=-inf;
+        for(int i=1; i<=W+1; ++i)
+            for(int j=0; j<=ASi[i]; ++j)
+                dp[i][j]=(-APi[i]*j);
+        for(int i=2; i<=T; ++i)
+        {
+            for(int j=0; j<=MaxP; ++j)
+                dp[i][j]=max(dp[i][j],dp[i-1][j]);
+            if(i<=W+1) continue;
+            //买入
+            front=back=1;
+            for(int j=0; j<=MaxP; ++j)
+            {
+                temp.p=j;
+                temp.x=dp[i-W-1][j]+APi[i]*j;
+                for(;front<back&&q[back-1].x<temp.x;--back);
+                q[back++]=temp;
+                for(;front<back&&q[front].p+ASi[i]<j;++front);
+                dp[i][j]=max(dp[i][j],q[front].x-APi[i]*j);
+            }
+            //卖出
+            front=back=1;
+            for(int j=MaxP; j>=0; --j)
+            {
+                temp.p=j;
+                temp.x=dp[i-W-1][j]+BPi[i]*j;
+                for(;front<back&&q[back-1].x<temp.x;--back);
+                q[back++]=temp;
+                for(;front<back&&q[front].p-BSi[i]>j;++front);
+                dp[i][j]=max(dp[i][j],q[front].x-BPi[i]*j);
+            }
+        }
+        int ans=0;
+        for(int i=0;i<=MaxP;++i)
+            ans=max(ans,dp[T][i]);
+        printf("%d\n",ans);
+    }
+    return 0;
+}
diff --git a/HDOJ/5868_zufezzt.cpp b/HDOJ/5868_zufezzt.cpp
new file mode 100644
index 0000000..59038d9
--- /dev/null
+++ b/HDOJ/5868_zufezzt.cpp
@@ -0,0 +1,147 @@
+#pragma comment(linker, "/STACK:1024000000,1024000000")
+#include<cstdio>
+#include<cstring>
+#include<cmath>
+#include<algorithm>
+#include<vector>
+#include<map>
+#include<set>
+#include<queue>
+#include<stack>
+#include<iostream>
+using namespace std;
+typedef long long LL;
+const double pi=acos(-1.0),eps=1e-6;
+void File()
+{
+    freopen("D:\\in.txt","r",stdin);
+    freopen("D:\\out.txt","w",stdout);
+}
+template <class T>
+inline void read(T &x)
+{
+    char c=getchar(); x=0;
+    while(!isdigit(c)) c=getchar();
+    while(isdigit(c)) {x=x*10+c-'0'; c=getchar();}
+}
+
+LL n,mod=1e9+7;
+
+LL extend_gcd(LL a,LL b,LL &x,LL &y)
+{
+    if(a==0&&b==0) return -1;
+    if(b==0){x=1;y=0;return a;}
+    LL d=extend_gcd(b,a%b,y,x);
+    y-=a/b*x;
+    return d;
+}
+
+LL mod_reverse(LL a,LL n)
+{
+    LL x,y;
+    LL d=extend_gcd(a,n,x,y);
+    if(d==1) return (x%n+n)%n;
+    else return -1;
+}
+
+LL phi(LL n)
+{
+     LL res=n,a=n;
+     for(int i=2;i*i<=a;i++)
+     {
+         if(a%i==0)
+         {
+             res=res/i*(i-1);
+             while(a%i==0) a/=i;
+         }
+     }
+     if(a>1) res=res/a*(a-1);
+     return res;
+}
+
+struct Matrix
+{
+    LL A[3][3];
+    int R, C;
+    Matrix operator*(Matrix b);
+};
+
+Matrix X, Y, Z;
+
+Matrix Matrix::operator*(Matrix b)
+{
+    Matrix c;
+    memset(c.A, 0, sizeof(c.A));
+    int i, j, k;
+    for (i = 1; i <= R; i++)
+        for (j = 1; j <= b.C; j++)
+            for (k = 1; k <= C; k++)
+                c.A[i][j] = (c.A[i][j] + (A[i][k] * b.A[k][j]) % mod) % mod;
+    c.R = R; c.C = b.C;
+    return c;
+}
+
+void init()
+{
+    memset(X.A, 0, sizeof X.A);
+    memset(Y.A, 0, sizeof Y.A);
+    memset(Z.A, 0, sizeof Z.A);
+
+    Y.R = 2; Y.C = 2;
+    for (int i = 1; i <= 2; i++) Y.A[i][i] = 1;
+
+    X.R = 2; X.C = 2;
+    X.A[1][1]=0; X.A[1][2]=1;
+    X.A[2][1]=1; X.A[2][2]=1;
+
+    Z.R = 1; Z.C = 2;
+    Z.A[1][1]=0; Z.A[1][2]=1;
+}
+
+LL work(int x)
+{
+    x--;
+    while (x)
+    {
+        if (x % 2 == 1) Y = Y*X;
+        x = x >> 1;
+        X = X*X;
+    }
+    Z = Z*Y;
+    return Z.A[1][2];
+}
+
+LL fib(int x)
+{
+    if(x==0) return 0;
+    init();
+    return work(x);
+}
+
+int main()
+{
+    while(~scanf("%lld",&n))
+    {
+        if(n==1) { printf("2\n"); continue; }
+        LL ans=0;
+
+        for(LL i=1;i*i<=n;i++)
+        {
+            if(n%i!=0) continue;
+
+            LL t=phi(n/i)*((fib(i-1)+fib(i+1))%mod)%mod;
+            ans=(ans+t)%mod;
+
+            if(n/i!=i)
+            {
+                t=phi(i)*((fib(n/i-1)+fib(n/i+1))%mod)%mod;
+                ans=(ans+t)%mod;
+            }
+        }
+
+        LL ni=mod_reverse(n,mod);
+        ans=ans*ni%mod;
+        printf("%lld\n",ans);
+    }
+    return 0;
+}
diff --git a/HDOJ/5869_kopyh.cpp b/HDOJ/5869_kopyh.cpp
new file mode 100644
index 0000000..6904932
--- /dev/null
+++ b/HDOJ/5869_kopyh.cpp
@@ -0,0 +1,136 @@
+//kopyh
+#include <bits/stdc++.h>
+#define INF 0x3f3f3f3f
+#define MOD 1000000007
+#define N 112345
+using namespace std;
+int n,m,sum,res,flag;
+#define root 1 , n , 1
+#define lson l , m , rt << 1
+#define rson m + 1 , r , rt << 1 | 1
+struct node
+{
+    int pos,val;
+    node(int x=0,int y=0){pos=x,val=y;}
+    friend bool operator < (node a, node b)
+    {
+        return a.val < b.val;
+    }
+    friend node operator + (node a, node b)
+    {
+        return  node(a.pos,a.val+b.val);
+    }
+}arr[N<<2];
+int add[N<<2],tot;
+void pushUp(int rt)
+{
+    arr[rt] = arr[rt<<1]+arr[rt<<1|1];
+}
+void pushDown(int l,int r,int rt)
+{
+    if(add[rt])
+    {
+        int m = (l+r)>>1;
+        add[rt<<1] += add[rt];
+        add[rt<<1|1] += add[rt];
+        arr[rt<<1].val += (m-l+1)*add[rt];
+        arr[rt<<1|1].val += (r-m)*add[rt];
+        add[rt] = 0;
+    }
+}
+void updata(int l,int r,int rt,int ql,int qr,int val)
+{
+    if(l>qr||ql>r)return;
+    if(l>=ql&&r<=qr)
+    {
+        arr[rt].val += (r-l+1)*val;
+        add[rt] += val;
+        return;
+    }
+    pushDown(l,r,rt);
+    int m = (l+r)>>1;
+    if(ql<=m)updata(lson,ql,qr,val);
+    if(qr>m)updata(rson,ql,qr,val);
+    pushUp(rt);
+}
+void build(int l,int r,int rt)
+{
+    add[rt]=0;
+    if(l == r)
+    {
+        arr[rt].val = 0;
+        arr[rt].pos = tot;
+        return;
+    }
+    int m = (l+r)>>1;
+    build(lson);
+    build(rson);
+    pushUp(rt);
+}
+node query(int l,int r,int rt,int ql,int qr)
+{
+    if(l>qr||ql>r)
+        return node(0,0);
+    if(l>=ql&&r<=qr)
+        return arr[rt];
+    pushDown(l,r,rt);
+    int m = (l+r)>>1;
+    return query(lson,ql,qr)+query(rson,ql,qr);
+}
+int a[N],pos[N*10],ans[N];
+vector<pair<int,int> >vc[N],qu[N];
+int gcd(int x,int y)
+{   return y?gcd(y,x%y):x;  }
+int main()
+{
+    #ifndef ONLINE_JUDGE
+        freopen("test.txt","r",stdin);
+    #endif
+    int i,j,k,cas,T,t,x,y,z,now;
+    while(scanf("%d%d",&n,&m)!=EOF)
+    {
+        for(i=1;i<=n;i++)
+        {
+            scanf("%d",&a[i]);
+            vc[i].clear();
+            qu[i].clear();
+        }
+        for(i=1;i<=n;i++)
+        {
+            x=a[i]; y=i;
+            for(j=0;j<vc[i-1].size();j++)
+            {
+                t = gcd(vc[i-1][j].first,a[i]);
+                if(t!=x)
+                {
+                    vc[i].push_back(make_pair(x,y));
+                    x=t; y=vc[i-1][j].second;
+                }
+            }
+            vc[i].push_back(make_pair(x,y));
+        }
+        for(i=1;i<=m;i++)
+        {
+            scanf("%d%d",&x,&y);
+            qu[y].push_back(make_pair(x,i));
+        }
+        memset(pos,0,sizeof(pos));
+        build(root);
+        for(i=1;i<=n;i++)
+        {
+            for(j=0;j<vc[i].size();j++)
+                if(pos[vc[i][j].first] < vc[i][j].second)
+                {
+                    if(pos[vc[i][j].first])updata(root,pos[vc[i][j].first],pos[vc[i][j].first],-1);
+                    updata(root,vc[i][j].second,vc[i][j].second,1);
+                    pos[vc[i][j].first] = vc[i][j].second;
+//                    printf("pos=%d %d\n",vc[i][j].first,pos[vc[i][j].first]);
+                }
+            for(j=0;j<qu[i].size();j++)
+                ans[qu[i][j].second] = query(root,qu[i][j].first,i).val;
+        }
+        for(i=1;i<=m;i++)
+            printf("%d\n",ans[i]);
+    }
+    return 0;
+}
diff --git a/HDOJ/5869_zxhl.cpp b/HDOJ/5869_zxhl.cpp
new file mode 100644
index 0000000..2c1c62e
--- /dev/null
+++ b/HDOJ/5869_zxhl.cpp
@@ -0,0 +1,76 @@
+#include<iostream>
+#include<algorithm>
+#include<cstdio>
+#include<cstring>
+#include<cmath>
+#include<vector>
+using namespace std;
+
+#pragma comment(linker, "/STACK:102400000,102400000")
+#define ls i<<1
+#define rs ls | 1
+#define mid ((ll+rr)>>1)
+#define pii pair<int,int>
+#define MP make_pair
+
+typedef long long LL;
+const long long INF = 1e18;
+const double Pi = acos(-1.0);
+const int N = 1e6+10, M = 1e2+11, mod = 1e9+7, inf = 2e9;
+
+int n,q,a[N],ans[N];
+int gcd(int a, int b) { return b == 0 ? a : gcd(b, a%b);}
+vector<pii> G[N];
+struct QQ{
+        int l,r,id;
+        bool operator < (const QQ &a) const {
+             return a.r > r;
+        }
+}Q[N];
+int C[N],vis[N];
+void update(int x,int c) {
+        for(int i =x; i < N; i+=i&(-i)) C[i] += c;
+}
+int ask(int x) {
+        int s =0 ;
+        for(int i = x; i; i-= i & (-i))s += C[i];
+        return s;
+}
+int main() {
+        while(scanf("%d%d",&n,&q)!=EOF) {
+            for(int i = 1; i <= n; ++i) scanf("%d",&a[i]);
+            for(int i = 0; i <= n; ++i) G[i].clear();
+            for(int i = 1; i <= n; ++i) {
+                    int x = a[i];
+                    int y = i;
+                    for(int j = 0; j < G[i-1].size(); ++j) {
+                        int res = gcd(x,G[i-1][j].first);
+                        if(x != res) {
+                                G[i].push_back(MP(x,y));
+                                x = res;
+                                y = G[i-1][j].second;
+                        }
+                    }
+                    G[i].push_back(MP(x,y));
+            }
+            memset(C,0,sizeof(C));
+            memset(vis,0,sizeof(vis));
+            for(int i = 1; i <= q; ++i) {scanf("%d%d",&Q[i].l,&Q[i].r),Q[i].id = i;}
+            sort(Q+1,Q+q+1);
+            for(int R = 0, i = 1; i <= q; ++i) {
+                    while(R < Q[i].r) {
+                        R++;
+                        for(int j = 0; j < G[R].size(); ++j) {
+                            int res = G[R][j].first;
+                            int ids = G[R][j].second;
+                            if(vis[res]) update(vis[res],-1);
+                            vis[res] = ids;
+                            update(vis[res],1);
+                        }
+                    }
+                    ans[Q[i].id] = ask(R) - ask(Q[i].l-1);
+            }
+            for(int i = 1; i <= q; ++i) cout<<ans[i]<<endl;
+        }
+        return 0;
+}
diff --git a/HDOJ/5870_fzmh.cpp b/HDOJ/5870_fzmh.cpp
new file mode 100644
index 0000000..68207fb
--- /dev/null
+++ b/HDOJ/5870_fzmh.cpp
@@ -0,0 +1,152 @@
+#include<cstdio>
+#include<vector>
+#include<set>
+#include<queue>
+#include<algorithm>
+#define mp make_pair
+#define pb push_back
+#define fi first
+#define sc second
+using namespace std;
+const int N = 201010;
+const int M = 2010101;
+const int inf = 2100000000;
+typedef pair<int,int> P; 
+priority_queue<P,vector<P>,greater<P> > Q;
+int n,m,i,a,b,c,dis[N],cnt[N],dis1[N],cnt1[N],dis2[N],cnt2[N],X;
+int id[N],ID[N],Id[N];
+vector<P> e[N];
+void gao(int x)
+{
+    int i;
+    for (i=1;i<=n;i++)
+    dis[i]=inf,cnt[i]=0;
+    dis[x]=0;
+    cnt[x]=1;
+    Q.push(mp(0,x));
+    while (!Q.empty())
+    {
+        P tmp=Q.top();
+        Q.pop();
+        x=tmp.sc;
+        if (dis[x]!=tmp.fi) continue;
+        for (i=0;i<e[x].size();i++)
+        if (dis[x]+e[x][i].sc<dis[e[x][i].fi])
+        {
+            dis[e[x][i].fi]=dis[x]+e[x][i].sc;
+            cnt[e[x][i].fi]=cnt[x];
+            Q.push(mp(dis[e[x][i].fi],e[x][i].fi));
+        }
+        else
+        if (dis[x]+e[x][i].sc==dis[e[x][i].fi])
+        {
+            cnt[e[x][i].fi]+=cnt[x];
+            if (cnt[e[x][i].fi]>X) cnt[e[x][i].fi]=X;
+        }
+    }
+}
+
+int ls[M],rs[M],s[M],tot,root[N];
+void build(int &x,int a,int b)
+{
+    x=++tot;
+    ls[x]=rs[x]=s[x]=0;
+    if (b-a>1)
+    {
+        int m=(a+b)>>1;
+        build(ls[x],a,m);
+        build(rs[x],m,b);
+    }
+}
+void insert(int y,int &x,int a,int b,int l,int r)
+{
+    x=++tot;
+    ls[x]=ls[y];rs[x]=rs[y];s[x]=s[y]+1;
+    if ((a<=l)&&(r<=b))
+    return;
+    int m=(l+r)>>1;
+    if (a<m) insert(ls[y],ls[x],a,b,l,m);
+    if (m<b) insert(rs[y],rs[x],a,b,m,r);
+}
+int query(int x,int a,int b,int l,int r)
+{
+    if ((a<=l)&&(r<=b))
+    return s[x];
+    int m=(l+r)>>1,ans=0;
+    if (a<m) ans+=query(ls[x],a,b,l,m);
+    if (m<b) ans+=query(rs[x],a,b,m,r);
+    return ans;
+}
+bool cmp(int a,int b)
+{
+    return dis2[a]<dis2[b];
+}
+bool CMP(int a,int b)
+{
+    return cnt2[a]>cnt2[b];
+}
+int main()
+{
+    while (~scanf("%d%d",&n,&m))
+    {
+    if (n+m==0) return 0;
+    for (i=1;i<=n;i++) e[i].clear();
+    scanf("%d",&X);
+    for (i=1;i<=m;i++)
+    {
+        scanf("%d%d%d",&a,&b,&c);
+        e[a].pb(mp(b,c));
+        e[b].pb(mp(a,c));
+    }
+    gao(1);
+    for (i=1;i<=n;i++)
+    dis1[i]=dis[i],cnt1[i]=cnt[i];
+    gao(n);
+    for (i=1;i<=n;i++)
+    dis2[i]=dis[i],cnt2[i]=cnt[i];
+    
+    tot=0;
+    build(root[0],0,n);
+    for (i=1;i<=n;i++)
+    id[i]=i;
+    sort(id+1,id+1+n,cmp);
+    for (i=1;i<=n;i++)
+    ID[id[i]]=i;
+    
+    for (i=1;i<=n;i++)
+    Id[i]=i;
+    sort(Id+1,Id+1+n,CMP);
+    for (i=1;i<=n;i++)
+        insert(root[i-1],root[i],ID[Id[i]]-1,ID[Id[i]],0,n);
+    long long ans=0;
+    for (i=1;i<=n;i++)
+    {
+        int l=1,r=n;
+        while (l<=r)
+        {
+            m=(l+r)>>1;
+            if (dis2[id[m]]+dis1[i]+1<=dis1[n]) l=m+1;else r=m-1;
+        }
+        int j=r;
+
+        l=1;r=n;
+        while (l<=r)
+        {
+            m=(l+r)>>1;
+            if (1LL*cnt1[i]*cnt2[Id[m]]>=X) l=m+1;else r=m-1;
+        }
+        
+        if (j) ans=ans+query(root[r],0,j,0,n);
+        
+        
+        for (int k=0;k<e[i].size();k++)
+        if (dis2[e[i][k].fi]+1+dis1[i]<=dis1[n])
+        if (1LL*cnt1[i]*cnt2[e[i][k].fi]>=X) ans--;
+    
+        if (dis1[i]+dis2[i]+1<=dis1[N])
+        if (1LL*cnt1[i]*cnt2[i]>=X) ans--;
+        
+    }
+    printf("%lld\n",ans);
+    }
+}
diff --git a/HDOJ/5872_kopyh.cpp b/HDOJ/5872_kopyh.cpp
new file mode 100644
index 0000000..2bfc47e
--- /dev/null
+++ b/HDOJ/5872_kopyh.cpp
@@ -0,0 +1,22 @@
+//kopyh
+#include <bits/stdc++.h>
+#define INF 0x3f3f3f3f
+#define MOD 1000000007
+#define N 1123456
+using namespace std;
+long long n,m,sum,res,flag;
+int main()
+{
+    #ifndef ONLINE_JUDGE
+        freopen("test.txt","r",stdin);
+    #endif
+    long long i,j,cas,T,t,x,y,z,h,l,k;
+    while(scanf("%I64d%I64d%I64d",&h,&l,&k)!=EOF)
+    {
+        x=k/h;//最大人数时一排几个部门
+        y=k/(x+1);//多放一个部门时每个部门最多的人数
+        res=y+1;//加一个人保证不能多放一个部门
+        printf("%I64d\n",l/(k-k%res)+bool(l%(k-k%res)));//ok
+    }
+    return 0;
+}
diff --git a/HDOJ/5873_kopyh.cpp b/HDOJ/5873_kopyh.cpp
new file mode 100644
index 0000000..b41b042
--- /dev/null
+++ b/HDOJ/5873_kopyh.cpp
@@ -0,0 +1,38 @@
+//kopyh
+#include <bits/stdc++.h>
+#define INF 0x3f3f3f3f
+#define MOD 1000000007
+#define N 1123456
+using namespace std;
+long long n,m,sum,res,flag,a[N];
+int main()
+{
+    #ifndef ONLINE_JUDGE
+        freopen("test.txt","r",stdin);
+    #endif
+    int i,j,k,cas,T,t,x,y,z;
+    while(scanf("%I64d",&n)!=EOF)
+        while(n--)
+        {
+            flag=1; sum=0;
+            scanf("%I64d",&m);
+            for(i=0;i<m;i++)
+            {
+                scanf("%I64d",&a[i]);
+                sum+=a[i];
+            }
+            if(sum!=m*(m-1))flag=0;
+            else
+            {
+                sort(a,a+m);
+                res=0;
+                for(i=0;i<m;i++)
+                {
+                    res+=a[i];
+                    if(res<i*(i+1)){flag=0;break;}
+                }
+            }
+            printf(flag?"T\n":"F\n");
+        }
+    return 0;
+}
diff --git a/HDOJ/5874_qq_33184171.cpp b/HDOJ/5874_qq_33184171.cpp
new file mode 100644
index 0000000..b5e2f0f
--- /dev/null
+++ b/HDOJ/5874_qq_33184171.cpp
@@ -0,0 +1,15 @@
+#include <bits/stdc++.h>
+using namespace std;
+using LL = long long;
+int main()
+{
+    LL m,n;
+    while(~scanf("%I64d %I64d",&m,&n))
+    {
+        LL ans = m/2*(m-m/2);
+
+        if( ans <=  n)  puts("T");
+        else           puts("F");
+    }
+    return 0;
+}
diff --git a/HDOJ/5875_chen9510.cpp b/HDOJ/5875_chen9510.cpp
new file mode 100644
index 0000000..780de3d
--- /dev/null
+++ b/HDOJ/5875_chen9510.cpp
@@ -0,0 +1,48 @@
+// From http://www.cnblogs.com/chen9510/p/5862834.html
+// ONLY For Test
+#include <iostream>
+#include <algorithm>
+#include <cstdio>
+#include <cstring>
+#include <set>
+using namespace std;
+int A[100005];
+int pos[100005];
+int s[100005];
+
+int main()
+{
+    int T,N,M;
+    cin>>T;
+    while(T--)
+    {
+        scanf("%d",&N);
+        for(int i=1;i<=N;i++)
+            scanf("%d",&A[i]);
+        int num=1;
+        A[N+1]=-1;
+        s[1]=N+1;
+        for(int i=N;i>=1;i--)///单调栈；
+        {
+            while(A[i]<A[s[num]]) num--;
+            pos[i]=s[num];
+            s[++num]=i;
+        }
+        scanf("%d",&M);
+        while(M--)
+        {
+            int l,r;
+            scanf("%d%d",&l,&r);
+            int tmp=A[l];
+            while(l<=r)
+            {
+                if(tmp==0) break;
+                if(pos[l]>r) break;
+                tmp=tmp%A[pos[l]];
+                l=pos[l];
+            }
+            printf("%d\n",tmp);
+        }
+    }
+    return 0;
+}
diff --git a/HDOJ/5876_yuanjunlai141.cpp b/HDOJ/5876_yuanjunlai141.cpp
new file mode 100644
index 0000000..12ee4eb
--- /dev/null
+++ b/HDOJ/5876_yuanjunlai141.cpp
@@ -0,0 +1,98 @@
+#include <iostream>
+#include <stdio.h>
+#include <queue>
+#include <string.h>
+#include <stdlib.h>
+#include <set>
+using namespace std;
+const int maxn=200000*5,inf=0x3f3f3f3f;
+struct Edge
+{
+    int v,next,cap;
+
+} edge[maxn];
+int tot,head[maxn];
+int vis[maxn],du[maxn],dis[maxn];
+void init()
+{
+    tot=0;
+    memset(head,-1,sizeof(head));
+}
+void add_edge(int u,int v,int cap)
+{
+    edge[tot].v=v;
+    edge[tot].cap=cap;
+    edge[tot].next=head[u];
+    head[u]=tot++;
+}
+void bfs(int start,int n)
+{
+    set<int>s1;
+    set<int>s2;
+    set<int>::iterator it;
+    for(int i=1;i<=n;i++)
+    {
+        if(i!=start)
+            s1.insert(i);
+    }
+
+    queue<int>que;
+    que.push(start);
+    dis[start]=0;
+    while(!que.empty())
+    {
+        int u=que.front();
+        que.pop();
+            for(int i=head[u];i!=-1;i=edge[i].next)
+            {
+                int v=edge[i].v;
+                if(!s1.count(v))
+                    continue;
+                s1.erase(v);
+                s2.insert(v);
+
+            }
+            for(it=s1.begin();it!=s1.end();it++)
+            {
+                que.push(*it);
+                dis[*it]=dis[u]+1;
+            }
+            s1.swap(s2);
+            s2.clear();
+    }
+}
+int main()
+{
+    int s,n,t,m;
+    int u,v;
+    scanf("%d",&t);
+    while(t--)
+    {
+        scanf("%d%d",&n,&m);
+        init();
+        memset(du,0,sizeof(du));
+        for(int i=0; i<m; i++)
+        {
+            scanf("%d%d",&u,&v);
+            add_edge(u,v,1);
+            add_edge(v,u,1);
+        }
+         scanf("%d",&s);
+        bfs(s,n);
+
+        for(int i=1; i<=n; i++)
+        {
+            if(i==s)
+                continue;
+            if(dis[i]==inf)
+                dis[i]=-1;
+
+            printf("%d",dis[i]);
+            if(i==n)
+                printf("\n");
+            else
+                printf(" ");
+        }
+    }
+    return 0;
+}
diff --git a/HDOJ/5877_angon823.cpp b/HDOJ/5877_angon823.cpp
new file mode 100644
index 0000000..9e9b88c
--- /dev/null
+++ b/HDOJ/5877_angon823.cpp
@@ -0,0 +1,319 @@
+#include<stdio.h>
+#include<stdlib.h>
+#define MAXN 200005
+int cnt = 1, rt = 0;
+int Add[MAXN];
+
+struct Tree{
+	long long key;
+	int num, size, fa, son[2];
+}T[MAXN];
+
+inline void PushUp(int x)
+{
+	T[x].size = T[T[x].son[0]].size + T[T[x].son[1]].size + T[x].num;
+}
+
+inline void PushDown(int x)
+{
+	if (Add[x])
+	{
+		if (T[x].son[0])
+		{
+			T[T[x].son[0]].key += Add[x];
+			Add[T[x].son[0]] += Add[x];
+		}
+		if (T[x].son[1])
+		{
+			T[T[x].son[1]].key += Add[x];
+			Add[T[x].son[1]] += Add[x];
+		}
+		Add[x] = 0;
+	}
+}
+
+inline int Newnode(long long key, int fa) //新建一个节点并返回
+{
+	++cnt;
+	T[cnt].key = key;
+	T[cnt].num = T[cnt].size = 1;
+	T[cnt].fa = fa;
+	T[cnt].son[0] = T[cnt].son[1] = 0;
+	return cnt;
+}
+
+inline void Rotate(int x, int p) //0左旋 1右旋
+{
+	int y = T[x].fa;
+	PushDown(y);
+	PushDown(x);
+	T[y].son[!p] = T[x].son[p];
+	T[T[x].son[p]].fa = y;
+	T[x].fa = T[y].fa;
+	if (T[x].fa)
+		T[T[x].fa].son[T[T[x].fa].son[1] == y] = x;
+	T[x].son[p] = y;
+	T[y].fa = x;
+	PushUp(y);
+	PushUp(x);
+}
+
+void Splay(int x, int To) //将x节点移动到To的子节点中
+{
+	while (T[x].fa != To)
+	{
+		if (T[T[x].fa].fa == To)
+			Rotate(x, T[T[x].fa].son[0] == x);
+		else
+		{
+			int y = T[x].fa, z = T[y].fa;
+			int p = (T[z].son[0] == y);
+			if (T[y].son[p] == x)
+				Rotate(x, !p), Rotate(x, p); //之字旋
+			else
+				Rotate(y, p), Rotate(x, p); //一字旋
+		}
+	}
+	if (To == 0) rt = x;
+}
+
+int GetPth(int p, int To) //返回第p小的节点 并移动到To的子节点中
+{
+	if (!rt || p > T[rt].size) return 0;
+	int x = rt;
+	while (x)
+	{
+		PushDown(x);
+		if (p >= T[T[x].son[0]].size + 1 && p <= T[T[x].son[0]].size + T[x].num)
+			break;
+		if (p > T[T[x].son[0]].size + T[x].num)
+		{
+			p -= T[T[x].son[0]].size + T[x].num;
+			x = T[x].son[1];
+		}
+		else
+			x = T[x].son[0];
+	}
+	Splay(x, 0);
+	return x;
+}
+
+int Find(long long key) //返回值为key的节点 若无返回0 若有将其转移到根处
+{
+	if (!rt) return 0;
+	int x = rt;
+	while (x)
+	{
+		PushDown(x);
+		if (T[x].key == key) break;
+		x = T[x].son[key > T[x].key];
+	}
+	if (x) Splay(x, 0);
+	return x;
+}
+
+int Prev() //返回根节点的前驱 非重点
+{
+	if (!rt || !T[rt].son[0]) return 0;
+	int x = T[rt].son[0];
+	while (T[x].son[1])
+	{
+		PushDown(x);
+		x = T[x].son[1];
+	}
+	Splay(x, 0);
+	return x;
+}
+
+int Succ() //返回根结点的后继 非重点
+{
+	if (!rt || !T[rt].son[1]) return 0;
+	int x = T[rt].son[1];
+	while (T[x].son[0])
+	{
+		PushDown(x);
+		x = T[x].son[0];
+	}
+	Splay(x, 0);
+	return x;
+}
+
+void Insert(long long key) //插入key值
+{
+	if (!rt)
+		rt = Newnode(key, 0);
+	else
+	{
+		int x = rt, y = 0;
+		while (x)
+		{
+			PushDown(x);
+			y = x;
+			if (T[x].key == key)
+			{
+				T[x].num++;
+				T[x].size++;
+				break;
+			}
+			T[x].size++;
+			x = T[x].son[key > T[x].key];
+		}
+		if (!x)
+			x = T[y].son[key > T[y].key] = Newnode(key, y);
+		Splay(x, 0);
+	}
+}
+
+void Delete(long long key) //删除值为key的节点1个
+{
+	int x = Find(key);
+	if (!x) return;
+	if (T[x].num>1)
+	{
+		T[x].num--;
+		PushUp(x);
+		return;
+	}
+	int y = T[x].son[0];
+	while (T[y].son[1])
+		y = T[y].son[1];
+	int z = T[x].son[1];
+	while (T[z].son[0])
+		z = T[z].son[0];
+	if (!y && !z)
+	{
+		rt = 0;
+		return;
+	}
+	if (!y)
+	{
+		Splay(z, 0);
+		T[z].son[0] = 0;
+		PushUp(z);
+		return;
+	}
+	if (!z)
+	{
+		Splay(y, 0);
+		T[y].son[1] = 0;
+		PushUp(y);
+		return;
+	}
+	Splay(y, 0);
+	Splay(z, y);
+	T[z].son[0] = 0;
+	PushUp(z);
+	PushUp(y);
+}
+
+int GetRank(long long key) //获得值<=key的节点个数
+{
+	if (!Find(key))
+	{
+		Insert(key);
+		int tmp = T[T[rt].son[0]].size;
+		Delete(key);
+		return tmp;
+	}
+	else
+		return T[T[rt].son[0]].size + T[rt].num;
+}
+
+void Delete(int l, int r) //删除值在[l, r]中的所有节点 l!=r
+{
+	if (!Find(l)) Insert(l);
+	int p = Prev();
+	if (!Find(r)) Insert(r);
+	int q = Succ();
+	if (!p && !q)
+	{
+		rt = 0;
+		return;
+	}
+	if (!p)
+	{
+		T[rt].son[0] = 0;
+		PushUp(rt);
+		return;
+	}
+	if (!q)
+	{
+		Splay(p, 0);
+		T[rt].son[1] = 0;
+		PushUp(rt);
+		return;
+	}
+	Splay(p, q);
+	T[p].son[1] = 0;
+	PushUp(p);
+	PushUp(q);
+}
+#define MAX 100005
+#include<vector>
+#include<memory.h>
+using namespace std;
+int v[MAX];
+int N;
+long long K;
+long long res = 0;
+struct Edge
+{
+	int b;
+	int next;
+}edge[MAX];
+int edgeCnt = 1;
+int adj[MAX];
+void AddEdge(int a, int b)
+{
+	edge[edgeCnt].b = b;
+	edge[edgeCnt].next = adj[a];
+	adj[a] = edgeCnt++;
+}
+void Search(int now)
+{
+	res += GetRank(K / v[now]);
+	Insert(v[now]);
+	for(int p = adj[now]; p; p = edge[p].next)
+	{
+		Search(edge[p].b);
+	}
+	Delete(v[now]);
+}
+int in[MAX];
+int main() {
+	int T;
+	while(~scanf("%d", &T))
+    {
+        int i;
+        int a, b;
+        for (; T; T--)
+        {
+            scanf("%d%lld", &N, &K);
+            memset(adj, 0, (N + 1) * sizeof(int));
+            memset(in, 0, (N + 1) * sizeof(int));
+            edgeCnt = 1;
+            for (i = 1; i <= N; i++)
+            {
+                scanf("%d", &v[i]);
+            }
+            for (i = 1; i < N; i++)
+            {
+                scanf("%d%d", &a, &b);
+                in[b]++;
+                AddEdge(a, b);
+            }
+            for (i = 1; i <= N; i++)
+            {
+                if (in[i] == 0)
+                {
+                    break;
+                }
+            }
+            cnt = 1, rt = 0;
+            res = 0;
+            Search(i);
+            printf("%lld\n", res);
+        }
+    }
+	return 0;
+}
diff --git a/POJ/1957.cpp b/POJ/1957.cpp
new file mode 100644
index 0000000..e80e4ac
--- /dev/null
+++ b/POJ/1957.cpp
@@ -0,0 +1,130 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+struct Point2D
+{
+    int x,y;
+};
+int nextvec[6][2]=
+{
+    {
+        1,0
+    },
+    {
+        1,1
+    },
+    {
+        0,1
+    },
+    {
+        -1,0
+    },
+    {
+        -1,-1
+    },
+    {
+        0,-1
+    }
+};
+
+char stra[1024];
+char strb[1024];
+char buff[1024];
+Point2D pa[2000];
+Point2D pb[2000];
+
+bool cmp(const Point2D& a,const Point2D& b)
+{
+    if(a.x==b.x)
+    {
+        return a.y < b.y;
+    }
+    return a.x < b.x;
+}
+
+int main()
+{
+    int N;
+    scanf("%d%*c",&N);
+    while(N--)
+    {
+        memset(pa,0,sizeof(pa));
+        memset(pb,0,sizeof(pb));
+        gets(stra);
+        gets(strb);
+        gets(buff);
+        int lena=strlen(stra);
+        int lenb=strlen(strb);
+        if(lena==0&&lenb==0)
+        {
+            printf("true\n");
+            continue;
+        }
+        else if(lena!=lenb)
+        {
+            printf("false\n");
+            continue;
+        }
+        int x=0;
+        int y=0;
+        for(int i=0;i<lena;i++)
+        {
+            int dir=(stra[i]-'a');
+            x+=nextvec[dir][0];
+            y+=nextvec[dir][1];
+            pa[i].x=x;
+            pa[i].y=y;
+        }
+        pa[lena].x=0;
+        pa[lena].y=0;
+        sort(pa,pa+lena+1,cmp);
+
+        int flag=0;
+        for(int dirCLT=0;dirCLT<6;dirCLT++)
+        {
+            for(int startID=0;startID<=lena;startID++)
+            {
+                x=pa[startID].x;
+                y=pa[startID].y;
+                for(int i=0;i<lenb;i++)
+                {
+                    int dir=(strb[i]-'a'+dirCLT)%6;
+                    x+=nextvec[dir][0];
+                    y+=nextvec[dir][1];
+                    pb[i].x=x;
+                    pb[i].y=y;
+                }
+                pb[lenb].x=pa[startID].x;
+                pb[lenb].y=pa[startID].y;
+                sort(pb,pb+lenb+1,cmp);
+                int tflag=0;
+                for(int i=0;i<=lena;i++)
+                {
+                    if(pa[i].x!=pb[i].x||pa[i].y!=pb[i].y)
+                    {
+                        tflag=1;
+                        break;
+                    }
+                }
+                if(tflag==0)
+                {
+                    flag=1;
+                    break;
+                }
+            }
+            if(flag)
+                break;
+        }
+        if(flag)
+        {
+            printf("true\n");
+        }
+        else
+        {
+            printf("false\n");
+        }
+    }
+    return 0;
+}
diff --git a/POJ/2823_alongela.cpp b/POJ/2823_alongela.cpp
new file mode 100644
index 0000000..85369fa
--- /dev/null
+++ b/POJ/2823_alongela.cpp
@@ -0,0 +1,79 @@
+#include <iostream>
+#include <cstdio>
+using namespace std;
+
+const int N = 1000005;
+
+struct Elem
+{
+	int val;
+	int pos;
+};
+
+Elem maxque[N];
+Elem minque[N];
+int maxhead, minhead, maxtail, mintail;
+int maxans[N];
+int minans[N];
+int cur;
+
+int main()
+{
+	int n, w, num;
+	scanf("%d%d", &n, &w);
+	minhead = mintail = 0;
+	maxhead = maxtail = 0;
+	cur = 0;
+	for (int i = 0; i < w; ++i)
+	{
+		scanf("%d", &num);
+		
+		while (minhead < mintail && minque[mintail - 1].val >= num) --mintail;
+		minque[mintail].val = num;
+		minque[mintail].pos = i;
+		++mintail;
+
+		while (maxhead < maxtail && maxque[maxtail - 1].val <= num) --maxtail;
+		maxque[maxtail].val = num;
+		maxque[maxtail].pos = i;
+		++maxtail;
+	}
+	for (int i = w; i < n; ++i)
+	{
+		minans[cur] = minque[minhead].val;
+		maxans[cur] = maxque[maxhead].val;
+		++cur;
+
+		scanf("%d", &num);
+
+		while (minhead < mintail && i - minque[minhead].pos >= w) ++minhead;
+		while (minhead < mintail && minque[mintail - 1].val >= num) --mintail;
+		minque[mintail].val = num;
+		minque[mintail].pos = i;
+		++mintail;
+		
+		while (maxhead < maxtail && i - maxque[maxhead].pos >= w) ++maxhead;
+		while (maxhead < maxtail && maxque[maxtail - 1].val <= num) --maxtail;
+		maxque[maxtail].val = num;
+		maxque[maxtail].pos = i;
+		++maxtail;
+	}
+	minans[cur] = minque[minhead].val;
+	maxans[cur] = maxque[maxhead].val;
+	++cur;
+	
+	for (int i = 0; i < cur; ++i)
+	{
+		if (i > 0) putchar(' ');
+		printf("%d", minans[i]);
+	}
+	printf("\n");
+	for (int i = 0; i < cur; ++i)
+	{
+		if (i > 0) putchar(' ');
+		printf("%d", maxans[i]);
+	}
+	printf("\n");
+
+	return 0;
+}
diff --git a/SCU/4444_lvshubao1314.cpp b/SCU/4444_lvshubao1314.cpp
new file mode 100644
index 0000000..ee328ed
--- /dev/null
+++ b/SCU/4444_lvshubao1314.cpp
@@ -0,0 +1,112 @@
+/**
+SCU - 4444 别样最短路径-大数据完全图
+题目大意：给定一个完全图，其中有两种边，长度为a（不超过5e5）或长度为b（剩下的），求有1~n的最短路径（数据范围1e5）
+解题思路：如果1和n之间连边为a那么答案一定为a和一条最短的全由b组成的路径的较小者，如果1和n之间连边为b，那么答案一定
+           为b和一条最短的全由a组成的路径的较小者。对于第1种情况直接跑spfa就可以了，第二种情况由于边数较多，不能直接spfa
+           从1开始搜索与其相连的边权为b的边，用set维护一下，由于每个点只入队1次，复杂度还是允许的。这种处理方法还是第一
+           次做，感觉很巧妙
+*/
+#include <stdio.h>
+#include <string.h>
+#include <iostream>
+#include <algorithm>
+#include <set>
+#include <queue>
+using namespace std;
+typedef long long LL;
+const int INF=1e9+7;
+const int maxn=100100;
+int n,m,vis[maxn];
+LL a,b,dis[maxn];
+set<int>st,ts;
+set<int>::iterator it;
+int head[maxn],ip;
+void init()
+{
+    memset(head,-1,sizeof(head));
+    ip=0;
+}
+struct note
+{
+    int v,next;
+}edge[maxn*10];
+void addedge(int u,int v)
+{
+    edge[ip].v=v,edge[ip].next=head[u],head[u]=ip++;
+}
+void spfa()
+{
+    queue<int>q;
+    for(int i=0;i<=n;i++)dis[i]=INF;
+    memset(vis,0,sizeof(vis));
+    dis[1]=0;
+    q.push(1);
+    while(!q.empty())
+    {
+        int u=q.front();
+        q.pop();
+        vis[u]=0;
+        for(int i=head[u];i!=-1;i=edge[i].next)
+        {
+            int v=edge[i].v;
+            if(dis[v]>dis[u]+1)
+            {
+                dis[v]=dis[u]+1;
+                if(!vis[v])
+                {
+                    vis[v]=1;
+                    q.push(v);
+                }
+            }
+        }
+    }
+    printf("%lld\n",min(dis[n]*a,b));
+}
+void bfs()
+{
+    dis[n]=INF;
+    st.clear(),ts.clear();
+    for(int i=2;i<=n;i++)st.insert(i);
+    queue<int>q;
+    q.push(1);
+    dis[1]=0;
+    while(!q.empty())
+    {
+        int u=q.front();
+        q.pop();
+        for(int i=head[u];i!=-1;i=edge[i].next)
+        {
+            int v=edge[i].v;
+            if(st.count(v)==0)continue;
+            st.erase(v),ts.insert(v);
+        }
+        for(it=st.begin();it!=st.end();it++)
+        {
+            q.push(*it);
+            dis[*it]=dis[u]+1;
+        }
+        st.swap(ts);
+        ts.clear();
+    }
+    printf("%lld\n",min(dis[n]*b,a));
+}
+int main()
+{
+    while(~scanf("%d%d%lld%lld",&n,&m,&a,&b))
+    {
+        init();
+        int flag=0;
+        for(int i=0;i<m;i++)
+        {
+            int u,v;
+            scanf("%d%d",&u,&v);
+            if(u>v)swap(u,v);
+            addedge(u,v);
+            addedge(v,u);
+            if(u==1&&v==n)flag=1;
+        }
+        if(flag)bfs();
+        else spfa();
+    }
+    return 0;
+}
diff --git a/SCU/4444_woshinannan741.cpp b/SCU/4444_woshinannan741.cpp
new file mode 100644
index 0000000..e48985f
--- /dev/null
+++ b/SCU/4444_woshinannan741.cpp
@@ -0,0 +1,102 @@
+#include<cstdio>
+#include<cstring>
+#include<queue>
+#include<set>
+#include<algorithm>
+using namespace std;
+const int MAXN = 5e5+5;
+const int INF  = 0x3f3f3f3f;
+typedef long long LL;
+int head[MAXN],e;
+LL dis[MAXN];
+bool vis[MAXN];
+struct Edge{
+    int v,nxt,w;
+}E[MAXN<<1];
+void init()
+{
+    e=0;
+    memset(head,-1,sizeof head);
+    memset(vis,false,sizeof vis);
+}
+void add(int u,int v,int w)
+{
+    E[e].v = v;
+    E[e].w = w;
+    E[e].nxt = head[u];
+    head[u]  = e++;
+}
+struct QNode{
+    int v,c;
+    QNode(int _v,int _c){
+        v = _v;c=_c;
+    }
+    bool operator < (const QNode &a) const{
+        return c>a.c;
+    }
+};
+LL dijkstra(int n)
+{
+    memset(dis,INF,sizeof dis);
+    priority_queue<QNode>Q;
+    dis[1] = 0;
+    Q.push(QNode(1,0));
+    while(!Q.empty())
+    {
+        QNode tmp = Q.top();Q.pop();
+        int u = tmp.v;
+        if(vis[u]) continue;
+        vis[u] = true;
+        for(int i=head[u];~i;i=E[i].nxt){
+            int v = E[i].v;
+            int w = E[i].w;
+            if(vis[v]) continue;
+            if(dis[u]+w<dis[v]){
+                dis[v] = dis[u]+w;
+                Q.push(QNode(v,dis[v]));
+            }
+        }
+    }
+    return dis[n];
+}
+LL BFS(int n,LL val)
+{
+    set<int>ta,tb;
+    queue<int>Q;Q.push(1);
+    dis[1] = 0,dis[n] = INF;
+    for(int i=2;i<=n;i++) ta.insert(i);
+    while(!Q.empty())
+    {
+        int u = Q.front();Q.pop();
+        for(int i=head[u];~i;i=E[i].nxt){
+            int v = E[i].v;
+            if(!ta.count(v)) continue;
+            ta.erase(v);tb.insert(v);
+        }
+        for(set<int>::iterator it=ta.begin();it!=ta.end();it++){
+            Q.push(*it);
+            dis[*it] = dis[u] + val;
+        }
+        ta.swap(tb);tb.clear();
+    }
+    return dis[n];
+}
+int main()
+{
+    int N,M;
+    LL A,B;
+    int u,v;
+    while(~scanf("%d%d%lld%lld",&N,&M,&A,&B))
+    {
+        init();
+        bool flag = false;
+        for(int i=0;i<M;i++){
+            scanf("%d%d",&u,&v);
+            add(u,v,A);add(v,u,A);
+            if(min(u,v)==1&&max(u,v)==N)flag  =true;
+        }
+        if(!flag) printf("%lld\n",min(dijkstra(N),(LL)B));
+        else printf("%lld\n",min(BFS(N,B),(LL)A));
+    }
+    return 0;
+}
diff --git a/SCU/Readme.md b/SCU/Readme.md
new file mode 100644
index 0000000..9708041
--- /dev/null
+++ b/SCU/Readme.md
@@ -0,0 +1,3 @@
+#Sichuan University Online Judge 四川大学
+[Home Page](http://acm.scu.edu.cn/soj/ "Sichuan University Online Judge")  
+[ACM Home Page](http://acm.scu.edu.cn/ "四川大学 - ACM首页")  
diff --git a/UESTC/1685.cpp b/UESTC/1685.cpp
new file mode 100644
index 0000000..9310c91
--- /dev/null
+++ b/UESTC/1685.cpp
@@ -0,0 +1,71 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+
+#define MAXN 50100
+#define MAXH 110
+#define MAXVAL_H 100
+#define INF 0x3f3f3f3f
+
+int dp[2][MAXH];
+int bus[MAXH];
+
+int main()
+{
+    int N,C;
+    while(scanf("%d %d",&N,&C)==2)
+    {
+        /// Main Loop
+        int x;
+        scanf("%d",&x);
+        int index=0;
+        ///由于人无法变矮，因此这部分的花费记为INF
+        for(int i=0;i<x;i++) dp[index][i]=INF;
+        ///大于等于x的时候可以内增高呀！
+        for(int i=x;i<=MAXVAL_H;i++) dp[index][i]=(i-x)*(i-x);
+        N--;
+        while(N--)
+        {
+            ///登记一个新的身高x
+            scanf("%d",&x);
+            index=!index;///反转index(复用dp空间)
+            int begin=0;
+            int end=0;
+            /// 单调队列 方向: 小(0) --> 大(N)
+            for(int k=0;k<=MAXVAL_H;k++)
+            {
+                int cost=dp[!index][k]-k*C;
+                /// Pop Back
+                while(begin<end&& bus[end-1] > cost) end--;
+                /// Push Back
+                bus[end++]=cost;
+                if(k<x) {dp[index][k]=INF;}
+                ///队列最前面是值最小的
+                else {dp[index][k]=bus[begin]+k*C+(k-x)*(k-x);}
+            }
+            /// Empty
+            begin=end=0;
+            for(int k=MAXVAL_H;k>=0;k--)
+            {
+                int cost=dp[!index][k]+k*C;
+                /// Pop Back
+                while(begin<end&&bus[end-1] > cost) end--;
+                /// Push Back
+                bus[end++]=cost;
+                if(k>=x)
+                {
+                    dp[index][k]=min(dp[index][k],bus[begin]-k*C+(k-x)*(k-x));
+                }
+            }
+        }
+        int ans=INF;
+        for(int i=0;i<=MAXVAL_H;i++)
+        {
+            ans=min(dp[index][i],ans);
+        }
+        printf("%d\n",ans);
+    }
+    return 0;
+}
diff --git a/UESTC/Readme.md b/UESTC/Readme.md
new file mode 100644
index 0000000..755889f
--- /dev/null
+++ b/UESTC/Readme.md
@@ -0,0 +1,6 @@
+#University Of Electronic Science And Technology Of China
+#中国电子科技大学
+
+*UESTC OJ no longer exist. Submit on CDOJ or vjudge instead.*  
+
+[View On VJudge](http://acm.hust.edu.cn/vjudge/problem/#OJId=UESTC_old&probNum=&title=&source= "Problems - Virtual Judge")  
diff --git a/hihoCoder/Weekly/115_jianrenfang.cpp b/hihoCoder/Weekly/115_jianrenfang.cpp
new file mode 100644
index 0000000..0a10100
--- /dev/null
+++ b/hihoCoder/Weekly/115_jianrenfang.cpp
@@ -0,0 +1,71 @@
+#include <iostream>
+#include <cstring>
+#include <cstdio>
+#include <cstring>
+#include <algorithm>
+#include <cmath>
+#include <time.h>
+#include <string>
+#include <map>
+#include <stack>
+#include <vector>
+#include <set>
+#include <queue>
+#define inf 0x3f3f3f3f
+#define mod 10000
+typedef long long ll;
+using namespace std;
+const int N=505;
+const int M=100005;
+int n,m,k,ans,t;
+int pre[N];
+struct man
+{
+    int c,f;
+}w[N][N];
+bool bfs()
+{
+    queue<int>q;
+    q.push(1);
+    memset(pre,0,sizeof(pre));
+    pre[1]=1;
+    while(!q.empty()){
+        int u=q.front();q.pop();
+        for(int i=1;i<=t;i++){
+            if( !pre[i] && w[u][i].c>w[u][i].f){
+                pre[i]=pre[u]+1;
+                q.push(i);
+            }
+        }
+    }
+    return pre[t]!=0;
+}
+int dfs(int u,int sum)
+{
+    if(u==t||sum==0)return sum;
+    int tmp=sum,minn;
+    for(int i=1;i<=t;i++){
+        if(pre[i]==pre[u]+1&&w[u][i].c>w[u][i].f){
+            minn=dfs(i,min(tmp,w[u][i].c-w[u][i].f));
+            w[u][i].f+=minn;
+            w[i][u].f -=minn;
+            tmp-=minn;
+        }
+    }
+    return sum-tmp;
+}
+void Dinic()
+{
+    ans=0;
+    while(bfs())ans+=dfs(1,inf);
+    cout<<ans<<endl;
+}
+int main() {
+    scanf("%d%d",&n,&m);
+    memset(w,0,sizeof(w));
+    int a,b,v;
+    t=n;
+    while(m--)scanf("%d%d%d",&a,&b,&v),w[a][b].c+=v;
+    Dinic();
+    return 0;
+}