usaco Home on the Range

/*
ID: guo geer
PROG: range
LANG: C++
*/
#include<iostream>
#include<fstream>
#include<cstring>
#include<cmath>
using namespace std;

char data[300][300];
int dp[300][300];
int res[300];

int main()
{
    ifstream fin("range.in");
    ofstream fout("range.out");
    int n;
    while(fin>>n)
    {
                 cin.ignore();
                 for(int i=0; i<n; i++) fin>>data[i];
                 
                 for(int i=0; i<n; i++)
                 for(int j=0; j<n; j++)
                 dp[i][j] = data[i][j] - '0';
                 
                 for(int i=1; i<n; i++)
                 for(int j=1; j<n; j++)
                 if(dp[i][j] == 1)
                 {
                             dp[i][j] = min(dp[i-1][j-1], min(dp[i][j-1], dp[i-1][j]))+1;
                 }
                 
                 memset(res, 0, sizeof(res));
                 for(int i=1; i<n; i++)
                 for(int j=1; j<n; j++) 
                 res[dp[i][j]] ++;
                 
                 for(int i=n-1; i>=2; i--) res[i] += res[i+1];
                 
                 for(int i=2; i<=n; i++)
                 if(res[i] > 0) fout<<i<<' '<<res[i]<<endl;
    }
    return 0;
}