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00108.cpp
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00108.cpp
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#include <cstdio>
#include <algorithm>
using namespace std;
int main()
{
int tbl[110][110],n,ma,tmp;
scanf("%d",&n);
for(int i = 0;i <= n;i++)
for(int j = 0;j <= n;j++)
tbl[i][j] = 0;
for(int i = 1;i <= n;i++)
{
for(int j = 1;j <= n;j++)
scanf("%d",&tbl[i][j]);
}
for(int i = 1;i <= n;i++)
{
for(int j = 1;j <= n;j++)
tbl[i][j] += tbl[i][j-1];
}
for(int i = 1;i <= n;i++)
{
for(int j = 1;j <= n;j++)
tbl[i][j] += tbl[i-1][j];
}
ma = -32768;
for(int i = 1;i <= n;i++)
{
for(int j = 1;j <= n;j++)
{
for(int k = 0;k < i;k++)
{
for(int l = 0;l < j;l++)
{
tmp = tbl[i][j] - tbl[i][l] - tbl[k][j] + tbl[k][l];
ma = max(ma,tmp);
}
}
}
}
printf("%d\n",ma);
return 0;
}