A:

#include<stdio.h>
int main()
{
    printf("BCBAD\n");
    return 0;
}

B:

#include<iostream>
#include<algorithm>
#include<stack>
#include<queue>
#include<stdio.h>
#include<cmath>
#include<cstring>
using namespace std;
# define ll long long
# define maxn 1000000+1000
# define inf 0x3f3f3f3f
int ans[maxn];
int main()
{
    memset(ans,0,sizeof(ans));
    int n;
    scanf("%d",&n);
    for(int i=1; i<=n; i++)
    {
        scanf("%d",&ans[i]);
        ans[i]+=ans[i-1];
    }
    int t1,t2;
    while(~scanf("%d %d",&t1,&t2)&&(t1+t2))
    {
        if(t1!=0)
            printf("%d\n",ans[t2]-ans[t1-1]);
        else printf("%d\n",ans[t2]);
    }
    return 0;
}

C：

#include <stdio.h>
int main()
{
    int n, i, j;
    while(scanf("%d", &n) != EOF)
    {
        for(i = 1; i <= n / 2 + 1; i++)
        {
            for(j = 1; j <= n - (i - 1) * 2; j++)printf(" ");
            if(i == 1)
            {
                for(j = 1; j <= n; j++)printf("*");
                for(j = 1; j <= n; j++)printf(" ");
                for(j = 1; j <= n; j++)printf("*");
            }
            else
            {
                for(j = 1; j <= n * 3 + (i - 1) * 4; j++)printf("*");
            }
            printf("\n");
        }
        for(i = n / 2 + 2; i <= n; i++)
        {
            for(j = 1; j <= n * 3 + (n / 2) * 4; j++)printf("*");
            printf("\n");
        }
        for(i = 1; i <= n; i++)
        {
            for(j = 1; j <= i * 2; j++)printf(" ");
            for(j = 1; j <= n * 3 + (n / 2) * 4 - 4 * i; j++)printf("*");
            printf("\n");
        }
    }
    return 0;
}

D：

#include <stdio.h>
#include <stdlib.h>
//#include<bits/stdc++.h>

int main()
{
    int   n,x,y,i,MAXx,MAXy,MINx,MINy,ans;
    scanf("%d",&n);

    MAXx = -1,MAXy = -1;
    MINx = 100000 ,MINy = 100000 ;
    for(i=1;i<=n;i++)
    {
        scanf("%d%d",&x,&y);

        if(x > MAXx) MAXx = x;
        if(x < MINx) MINx = x;
        if(y > MAXy) MAXy = y;
        if(y < MINy) MINy = y;
     }
    if(MAXx - MINx > MAXy - MINy) ans = (MAXx-MINx) * (MAXx - MINx);
    else ans = (MAXy - MINy) * (MAXy - MINy);
    printf("%d\n",ans);
    return 0;
}

E：

#include <stdio.h>

int main()
{
    int n,m;
    while(~scanf("%d %d",&n,&m))
    {
        if(n+m>=4)
        {
            if(n==0&&m==4)printf("ldq is the winner!\n");
            else printf("Xh is the winner!\n");
        }
        else if(n==0&&m==3)printf("Xh is the winner!\n");
        else if(n==1&&m==1)printf("Xh is the winner!\n");
        else printf("ldq is the winner!\n");
    }
    return 0;
}