func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     long long n;     cin >> n;     string s;     cin >> s;     long long o = 0;     long long z = 0;     for (long long i = 0; i < n; i++)       if (s[i] ==  n )         o++;       else if (s[i] ==  z )         z++;     while (o--) cout << 1 <<    ;     while (z--) cout << 0 <<    ;   }   int main() {     long long t;     t = 1;     while (t--) {       solve();     }     return 0;   }   