func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int two = 0, one = 0;     int x[n + 1000];     for (int i = 0; i < n; ++i) cin >> x[i];     for (int i = 0; i < n; ++i) {       if (x[i] == 2)         ++two;       else         ++one;     }     if (two == 0) {       for (int i = 0; i < one; ++i) cout <<  1  ;     } else if (one == 0) {       for (int i = 0; i < two; ++i) cout <<  2  ;     } else {       --two;       cout <<  2  ;       --one;       cout <<  1  ;       for (int i = 0; i < two; ++i) cout <<  2  ;       for (int i = 0; i < one; ++i) cout <<  1  ;     }   }   