1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
#include <bits/stdc++.h>

using namespace std;

// { 3, 4, 5, 6 }
const char mapping[] = { 'a', 'c', 'g', 'o'};

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n; cin >> n;
    string s; cin >> s;
    int ones = 0;
    for (char &i: s)
      ones += i == '1';
    if (ones > 6 * n || ones < 3 * n) {
      cout << "NIE\n";
      return 0;
    }
    for (int i = 0; i < n; i++) {
      int popcount = ones / (n - i);
      cout << mapping[popcount - 3];
      ones -= popcount;
    }
    cout << '\n';
}