#include <iostream>
using namespace std;
const int N = 110;
int a[N], b[N];

int main() {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= n; j++) {
            int x;
            cin >> x;
            a[j] += x;
            b[i] += x;
        }
    for (int i = 1; i <= n; i++)
        if (a[i] != a[1] || b[i] != a[1]) {
            puts("NO");
            return 0;
        }
    puts("YES");
    return 0;
}