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为什么错?感觉挺好的思维就这样慌掉???求牛人帮忙解析代码,,,样例都过了#include<iostream>
using namespace std;
int main()
{
int A[101][101]={0};
int N,i,j,k;
while(~scanf("%d",&N))
{
for(i=0;i<N;i++)
{
for(j=0;j<N;j++)
{
cin>>A[i][j];
}
}
int B[101][101]={0};
int max=-9999999,a,b;
int s=0;
for(j=0;j<N;j++)
{
for(i=0;i<N;i++)
{
B[i][j]=s+A[i][j];
s=B[i][j];
}
s=0;
}
s=0;
for(k=0;k<N;k++)
{
for(i=k;i<N;i++)
{
for(j=0;j<N;j++)
{
if(i==k)
{
if(A[i][j]<=0)
s=0;
else
s+=A[i][j];
}
else
{
if(k==0)
s+=B[i][j];
else
if(B[i][j]-B[k-1][j]<0)
s=0;
else
s+=B[i][j]-B[k-1][j];
}
if(s>max)
max=s;
}
s=0;
}
}
cout<<max<<endl;
}
return 0;
}
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