diff --git a/HDOJ/1000_autoAC.cpp b/HDOJ/1000_autoAC.cpp
new file mode 100644
index 0000000..7094e82
--- /dev/null
+++ b/HDOJ/1000_autoAC.cpp
@@ -0,0 +1,10 @@
+#include <cstdio> 
+#include <iostream> 
+using namespace std;
+int main() 
+{ 
+    int a,b;
+    while(cin>>a>>b)
+        cout<<a+b<<endl;
+    return 0;
+}
diff --git a/HDOJ/1001_autoAC.cpp b/HDOJ/1001_autoAC.cpp
new file mode 100644
index 0000000..c657800
--- /dev/null
+++ b/HDOJ/1001_autoAC.cpp
@@ -0,0 +1,14 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+    int n,sum;
+    while(cin>>n)
+    {
+        sum = 0;
+        for(int i = 1;i <= n;++i)
+            sum += i;
+        cout<<sum<<endl<<endl;
+    }
+    return 0;
+}
diff --git a/HDOJ/1002_autoAC.cpp b/HDOJ/1002_autoAC.cpp
new file mode 100644
index 0000000..73016d4
--- /dev/null
+++ b/HDOJ/1002_autoAC.cpp
@@ -0,0 +1,61 @@
+#include <iostream>
+#include <string.h>
+using namespace std;
+void add ( char a[], char b[] )
+{
+    char sum[1010] = {' '};
+    int flg = 0;
+    int temp = 0;
+    int len_a = strlen ( a );
+    int len_b = strlen ( b );
+    int i = len_a;
+    int j = len_b;
+    for ( ; i > 0; i-- )
+    {
+        if ( j > 0 )
+        {
+            temp = a[i-1] + b[j-1] + flg - 96;
+            j--;
+        }
+        else temp = a[i-1] + flg - 48;
+        if ( temp >= 10 )
+        {
+            flg = 1;
+        }
+        else flg = 0;
+        temp = temp % 10;
+        sum[i] = temp + 48;
+    }
+    if ( flg == 1 ) sum[0] = 49;
+    i = 0;
+    while ( i <= len_ )
+    {
+        if ( sum[i] != ' ' ) cout << sum[i];
+        i++;
+    }
+    cout << endl;
+}
+int main()
+{
+    int N;
+    while ( cin >> N )
+    {
+        for ( int i = 1; i <= N; i++ )
+        {
+            char a[1000];
+            char b[1000];
+            cin >> a;
+            cin >> b;
+            int len_a = strlen ( a );
+            int len_b = strlen ( b );
+            cout << "Case " << i << ":\n" << a << " + " << b << " = ";
+            if ( len_a >= len_ )
+            {
+                add ( a, b );
+            }
+            else add ( b, a );
+            if ( i != N ) cout << endl;
+        }
+    }
+    return 0;
+}
diff --git a/HDOJ/1003_autoAC.cpp b/HDOJ/1003_autoAC.cpp
new file mode 100644
index 0000000..55c0aec
--- /dev/null
+++ b/HDOJ/1003_autoAC.cpp
@@ -0,0 +1,36 @@
+#include <stdio.h>
+int data[100000];
+int main()
+{
+    int i,j,k,l,sum,b,e,max=0,t;
+    scanf("%d",&i);
+    for (j=1;j<=i;j++)
+    {
+        max = -100000;
+        scanf("%d",&k);
+        for (sum=0, l=0, t=0 , e=0;l<k;l++)
+        {
+            scanf("%d",&data[l]);
+            if (sum>=0)
+            {
+                sum+=data[l];
+            }
+            else
+            {
+                sum = data[l];
+                t = l;
+            }
+            if (sum>max)
+            {
+                max = sum;
+                b = t;
+                e = l;
+            }
+        }
+        printf("Case %d:\n",j);
+        printf("%d %d %d\n",max,b+1,e+1);
+        if (j != i)
+            printf("\n");
+    }
+    return 1;
+}
diff --git a/HDOJ/1004_autoAC.cpp b/HDOJ/1004_autoAC.cpp
new file mode 100644
index 0000000..896144f
--- /dev/null
+++ b/HDOJ/1004_autoAC.cpp
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+char ballons[1000][15];
+int sum[1000];
+int ballons_idx;
+int n;
+int InBallons(char* tmp)
+{
+    int i;
+    for (i=0;i<ballons_idx;i++)
+    {
+        if (strcmp(tmp,ballons[i]) == 0)
+        {
+            sum[i]++;
+            return 1;
+        }
+    }
+    return 0;
+}
+int FindMax()
+{
+    int i, max=-1, idx=0;
+    for (i=0;i<ballons_idx;i++)
+    {
+        if (sum[i]>max)
+        {
+            max = sum[i];
+            idx = i;
+        }         
+    }
+    return idx;
+}
+int main()
+{
+    int i;
+    char tmp[15];
+    scanf("%d",&n);
+    while(n)
+    {
+        ballons_idx = 0;
+        memset(sum,0,sizeof(int)*1000);
+        for (i=0;i<n;i++)
+        {
+            scanf("%s",tmp);
+            if (InBallons(tmp) == 0)
+            {
+                strcpy(ballons[ballons_idx++],tmp);
+            }
+        }
+        printf("%s\n",ballons[FindMax()]);
+        scanf("%d",&n);
+    }
+    return 0;
+}
diff --git a/HDOJ/1005_autoAC.cpp b/HDOJ/1005_autoAC.cpp
new file mode 100644
index 0000000..94eb011
--- /dev/null
+++ b/HDOJ/1005_autoAC.cpp
@@ -0,0 +1,27 @@
+#include<stdio.h>
+int main()
+{
+    int f[200],a,b,n,i;
+    while(scanf("%d%d%d",&a,&b,&n),a||b||n)
+    {
+        if(n>2)
+        {
+            f[1]=f[2]=1;
+            for(i=3;i<200;i++)
+            {
+                f[i]=(a*f[i-1]+b*f[i-2])%7;
+                if(f[i-1]==1&&f[i]==1)
+                    break;
+            }
+            i-=2;
+            n=n%i;
+            if(n==0)
+                printf("%d\n",f[i]);
+            else
+                printf("%d\n",f[n]);
+        }
+        else
+            printf("1\n");
+    }
+    return 0;
+}
diff --git a/HDOJ/1006_autoAC.cpp b/HDOJ/1006_autoAC.cpp
new file mode 100644
index 0000000..1397e6e
--- /dev/null
+++ b/HDOJ/1006_autoAC.cpp
@@ -0,0 +1,36 @@
+#include<iostream>
+#include<iomanip>
+using namespace std;
+double max(double a,double b,double c){
+    if(b>a) a=b;
+    if(c>a) a=c;
+    return a;
+}
+double min(double a,double b,double c){
+    if(b<a) a=b;
+    if(c<a) a=c;
+    return a;
+}
+int main(){
+    const double vsm=5.9;
+    const double vsh=719.0/120;
+    const double vmh=11.0/120;
+    const double tsm=3600.0/59;
+    const double tsh=43200.0/719;
+    const double tmh=43200.0/11;
+    double d,t,start,end;
+    while(cin>>d,d!=-1){
+        t=0;
+        for(int i=0;i<11;i++){
+            for(int j=(int)((tmh*i+d/vmh-d/vsm)/tsm);j<=(int)((tmh*(i+1)-d/vmh-d/vsm)/tsm);j++){
+                for(int k=(int)((tsm*j+d/vsm-d/vsh)/tsh);k<=(int)((tsm*(j+1)-d/vsm-d/vsh)/tsh);k++){
+                    start=max(tsh*k+d/vsh,tsm*j+d/vsm,tmh*i+d/vmh);
+                    end=min(tsh*(k+1)-d/vsh,tsm*(j+1)-d/vsm,tmh*(i+1)-d/vmh);
+                    if(start<end) t+=end-start;
+                }
+            }
+        }
+        cout<<fixed<<setprecision(3)<<t/432<<endl;
+    }
+    return 0;
+}
diff --git a/HDOJ/1007_autoAC.cpp b/HDOJ/1007_autoAC.cpp
new file mode 100644
index 0000000..2fcab86
--- /dev/null
+++ b/HDOJ/1007_autoAC.cpp
@@ -0,0 +1,66 @@
+#include <algorithm>   
+using namespace std;  
+#include <stdio.h>   
+#include <math.h>   
+struct Point  
+{  
+    double x;  
+    double y;  
+};  
+int num;  
+Point points[100001];  
+Point assist[100001];  
+inline bool cmpx(Point a ,Point b )   
+{   
+    return a.x < b.x;  
+}   
+inline bool cmpy(Point a ,Point b )   
+{   
+    return a.y < b.y;  
+}   
+inline double space(Point a, Point b)  
+{  
+    return (a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y);  
+}  
+inline double minBinary(double a,double b)  
+{  
+    return a<b?a:b;  
+}  
+double binarySlove(int l,int r,Point* p)  
+{  
+    if(r-l==1)  
+        return space(p[l],p[r]);  
+    if(r-l==2)  
+        return minBinary(minBinary(space(p[l],p[l+1]),space(p[l],p[r])),space(p[l+1],p[r]));  
+    int half=(l+r)/2;  
+    double min=minBinary(binarySlove(l,half,p),binarySlove(half+1,r,p));  
+    double sqrtMin=sqrt(min);  
+    int cnt=0;  
+    for (int i=l;i<=r;i++)  
+        if(points[i].x<points[half].x+sqrtMin&&points[i].x>points[half].x-sqrtMin)  
+            assist[cnt++]=points[i];  
+    sort(assist,assist+cnt,cmpy);  
+    for (int i=0;i<cnt;i++)  
+        for (int j=i+1;j<cnt;j++)  
+        {  
+            if(assist[j].y-assist[i].y>sqrtMin)  
+                break;  
+            min=minBinary(min,space(assist[i],assist[j]));  
+        }  
+        return min;  
+}  
+int main()  
+{    
+    while(scanf("%d",&num)!=EOF&&num)  
+    {  
+        int min=0;  
+        for (int i=0;i<num;i++)  
+        {  
+            scanf("%lf%lf",&(points[i].x),&(points[i].y));  
+        }  
+        sort(points,points+num,cmpx);  
+        double result=binarySlove(0,num-1,points);  
+        printf("%.2lf\n",sqrt(result)/2);  
+    }  
+    return 0;  
+}
diff --git a/HDOJ/1008_autoAC.cpp b/HDOJ/1008_autoAC.cpp
new file mode 100644
index 0000000..3a754eb
--- /dev/null
+++ b/HDOJ/1008_autoAC.cpp
@@ -0,0 +1,24 @@
+#include <stdio.h>
+int main()
+{
+ int i,n,a[101],sum;
+ while(scanf("%d",&n),n)
+ {
+  sum=0; a[0]=0;
+  for(i=1;i<=n;i++)
+    scanf("%d",a+i);
+  for(i=0;i<n;i++)
+  {
+   if(a[i]<=a[i+1])  
+{
+    sum+=(a[i+1]-a[i])*6+5;
+   }
+   else if(a[i]>a[i+1])
+   {
+    sum+=(a[i]-a[i+1])*4+5;
+   }
+  }
+  printf("%d\n",sum);
+ }
+ return 0;
+}
diff --git a/HDOJ/1009_autoAC.cpp b/HDOJ/1009_autoAC.cpp
new file mode 100644
index 0000000..cd92bc6
--- /dev/null
+++ b/HDOJ/1009_autoAC.cpp
@@ -0,0 +1,51 @@
+#include<stdio.h>   
+#include <memory.h>   
+#include<stdlib.h>   
+struct Exchange{  
+    int room;  
+    int javabean;  
+};  
+int cmp( const void *a , const void *b )   
+{   
+    struct Exchange *c = (Exchange *)a;   
+    struct Exchange *d = (Exchange *)b;   
+    if (d->room*1.0/d->javabean > c->room*1.0/c->javabean)  
+        return 1;  
+    else if (d->room*1.0/d->javabean < c->room*1.0/c->javabean)  
+        return -1;  
+    else return 0;  
+}   
+double summation(Exchange* ex,int len,int javabeans)  
+{  
+    double sum=0;  
+    qsort(ex,len,sizeof(Exchange),cmp);  
+    for(int i=0;i<len;i++)  
+    {  
+        if(javabeans-ex[i].javabean>0)  
+        {  
+            sum+=ex[i].room;  
+            javabeans-=ex[i].javabean;  
+        }  
+        else  
+        {  
+            sum+=javabeans*1.0/ex[i].javabean*ex[i].room;  
+            break;  
+        }  
+    }  
+    return sum;  
+}  
+int main()  
+{  
+    int m,n;  
+    while(scanf("%d%d",&m,&n)!=EOF)  
+    {  
+        if(m==-1&&n==-1)  
+            break;  
+        Exchange* e=new Exchange[n];  
+        for(int i=0;i<n;i++)  
+            scanf("%d%d",&(e[i].room),&(e[i].javabean));  
+        double result=summation(e,n,m);  
+        printf("%.3lf\n",result);  
+    }  
+    return 0;  
+}
diff --git a/HDOJ/1010_autoAC.cpp b/HDOJ/1010_autoAC.cpp
new file mode 100644
index 0000000..0de4ecb
--- /dev/null
+++ b/HDOJ/1010_autoAC.cpp
@@ -0,0 +1,83 @@
+#include<stdio.h>
+#include<math.h>
+int time,atx,aty,n,m;
+char map[26][26];
+bool flag;
+void dfs(int x,int y,int t)
+{
+    if(x<0||x>=n||y<0||y>=m)
+        return;
+    if(flag==true||(t==0&&x==atx&&aty==y))
+    {
+        flag=true;
+        return;
+    }
+    int temp=t-abs(x-atx)-abs(y-aty); 
+    if(temp<0 || temp&1)
+        return;
+    map[x][y]='X';
+    if(map[x+1][y]!='X')
+    {
+        dfs(x+1,y,t-1);
+        if(flag)
+           return;
+    }
+    if(map[x][y+1]!='X')
+    {
+        dfs(x,y+1,t-1);
+        if(flag)
+            return;
+    }
+    if(map[x-1][y]!='X')
+    {
+        dfs(x-1,y,t-1);
+        if(flag)
+            return;
+    }
+    if(map[x][y-1]!='X')
+    {
+        dfs(x,y-1,t-1);
+        if(flag)
+            return;
+    }
+    map[x][y]='.';
+}
+int main()
+{
+    int i,j,x,y,wall;
+    while(scanf("%d%d%d",&n,&m,&time)&&(n!=0||m!=0||time!=0))
+    {
+        flag=false;
+        wall=0;
+        for(i=0;i<n;++i)
+        {
+            scanf("%s",map[i]);
+            for(j=0;j<m;++j)
+            {
+                if(map[i][j]=='S')
+                {
+                    x=i;
+                    y=j;
+                }
+                if(map[i][j]=='D')
+                {
+                    atx=i;
+                    aty=j;
+                }
+                if(map[i][j]=='X')
+                    wall++;
+            }
+        }
+        dfs(x,y,time);
+        if(n*m-wall<=time)
+        {
+            printf("NO\n");
+            continue;
+        }
+        if(flag)
+            printf("YES\n");
+        else
+            printf("NO\n");
+    }
+    return 0;
+}
diff --git a/HDOJ/1011_autoAC.cpp b/HDOJ/1011_autoAC.cpp
new file mode 100644
index 0000000..1b6b4bc
--- /dev/null
+++ b/HDOJ/1011_autoAC.cpp
@@ -0,0 +1,64 @@
+#include <vector>
+#include <string.h>   
+using namespace std;  
+#include<stdio.h>   
+int roomNumber,trooperNumber;  
+vector<int> path[101];  
+int dp[101][101];  
+bool visited[101];  
+int cost[101];  
+int max(int a,int b)  
+{  
+    return a>b?a:b;  
+}  
+void solve(int deep)  
+{  
+    visited[deep]=true;  
+    for (int i=0;i<path[deep].size();i++)  
+    {  
+        int value=path[deep][i];  
+        if(visited[value]) continue;  
+        solve(value);  
+        for(int j=trooperNumber-1;j>=cost[deep];j--)  
+            for (int index=1;index+j<=trooperNumber;index++)  
+                if(dp[value][index])   
+                    dp[deep][j+index]=max(dp[deep][j+index],dp[deep][j]+dp[value][index]);  
+    }  
+}  
+int main()  
+{  
+    while (scanf("%d%d",&roomNumber,&trooperNumber)!=EOF)  
+    {  
+        if(roomNumber==-1&&trooperNumber==-1)  
+            break;  
+        for (int i=0;i<=roomNumber;i++)  
+        {  
+            path[i].clear();  
+        }  
+        memset(dp,0,sizeof(dp));  
+        memset(visited,0,sizeof(visited));  
+        int tempA;  
+        for(int i=1;i<=roomNumber;i++)  
+        {  
+            scanf("%d%d",&cost[i],&tempA);  
+            cost[i]=(cost[i]+19)/20;  
+            for (int j=cost[i];j<=trooperNumber;j++)  
+                dp[i][j]=tempA;  
+        }  
+        int tempB;  
+        for(int i=1;i<=roomNumber-1;i++)  
+        {  
+            scanf("%d%d",&tempB,&tempA);  
+            path[tempB].push_back(tempA);  
+            path[tempA].push_back(tempB);  
+        }  
+        if(trooperNumber==0)  
+            printf("0\n");  
+        else   
+        {  
+            solve(1);  
+            printf("%d\n",dp[1][trooperNumber]);  
+        }  
+    }  
+    return 0;  
+}