sb prog 14

#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("graf.in");
ofstream fout("muchii.txt");
int n, a[51][51];

int main() {
    fin >> n;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            fin >> a[i][j];
        }
    }

    for (int i = 1; i < n; i++) {
        for (int j = i + 1; j <= n; j++) {
            if (a[i][j]) {
                cout << i << ' ' << j << endl;
            }
        }
    }

    return 0;
}