MT2050 矩阵01变

#include <bits/stdc++.h>
using namespace std;
const int N = 105;
int n, m;
int b[N][N];
string c;
int main()
{
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        cin >> c;
        for (int j = 1; j <= m; j++)
        {
            b[i][j] = b[i - 1][j] + b[i][j - 1] - b[i - 1][j - 1] + c[j - 1] - '0';
        }
    }
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= m; j++)
        {
            cout << b[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}