http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1974

题意:问四个角都有同一个福娃的矩形有多少个。

 #include<bits/stdc++.h>
using namespace std; char aa[][],bb[]= {'B','J','H','Y','N'};
int main() {
int t,n,m;
int i,j,k,l,s,ss;
cin>>t;
while(t--) {
cin>>n>>m;
for(int =; i<n; i++)
cin>>aa[i];
ss=; for(l=; l<; l++) {//检查每一个福娃
for(i=; i<n; i++) {
for(j=i+; j<n; j++) {
s=;
for(k=; k<m; k++) {//检查两列中是否有相同的
if(a[i][k]==a[j][k]&&a[i][k]==bb[l])
s++;
}
}
ss+=s*(s-)/;//s个相同的能有s*(s-1)/2个矩阵
}
}
cout<<ss<<endl;
}
return ; }

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