func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     string s;     cin >> n >> s;     int ones = 0, zeros = 0;     for (char c : s) {       if (c ==  n ) ones++;       if (c ==  r ) zeros++;     }     while (ones--) cout <<  1  ;     while (zeros--) cout <<  0  ;     cout << endl;     return 0;   }   