OJ-Problems-Source/HDOJ/2483_autoAC.cpp

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#include <cstdio>
#include <cmath>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;
const int maxn=303;
int sum[maxn][maxn],e[maxn][maxn];
int find(int n,int m)
{
int i,j,k,ans=0,t=0,p,q;
if(e[n][m]==0)return 0;
for(i=n-1,j=m-1;i>=1&&j>=1;i--,j--,t++)
{
if(!e[i][m]||!e[n][j])return ans;
for(p=i,q=j;p<n;p++,q++)
if(!e[i][q]||!e[p][j])break;
if(p<n)continue;
p=sum[n-1][m-1]-sum[i][m-1]-sum[n-1][j]+sum[i][j];
if(abs(t*t-2*p)<=1)ans++;
}
return ans;
}
int main()
{
int T;
scanf("%d",&T);
while(T--)
{
int i,j,k,n,m,ans=0;
scanf("%d%d",&n,&m);
memset(sum,0,sizeof(sum));
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
scanf("%d",&e[i][j]);
sum[i][j]=sum[i-1][j]+sum[i][j-1]-sum[i-1][j-1]+e[i][j];
}
}
for(i=2;i<=n;i++)
for(j=2;j<=m;j++)
ans+=find(i,j);
printf("%d\n",ans);
}
return 0;
}