#include <bits/stdc++.h>   using namespace std;   int a[10001];   int i, j, n, k;   int main() {     cin >> n;     for (i = 0; i < n; i++)       for (j = 0; j < n; j++) {         cin >> k;         if (k == 3 || k == 1) a[i] = -1;       }     k = 0;     for (i = 0; i < n; i++)       if (a[i] != -1) k++;     cout << k <<   n ;     for (i = 0; i < n && k > 0; i++)       if (a[i] != -1) cout << i + 1 <<    ;     return 0;   }   