func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     int n, x;     vector<int> a, b, c;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> x;       if (x == 1)         a.push_back(i + 1);       else if (x == 2)         b.push_back(i + 1);       else         c.push_back(i + 1);     }     int res = min({a.size(), b.size(), c.size()});     cout << res << endl;     for (int i = 0; i < res; i++) {       cout << a[i] <<     << b[i] <<     << c[i] << endl;     }     return 0;   }   