func_code_string: #include <bits/stdc++.h>   using namespace std;   string eq(string c) {     string s =   ;     for (int i = 0; i < c.size(); i++) {       if (c[i] ==  2 )         s +=  2 ;       else if (c[i] ==  3 )         s +=  3 ;       else if (c[i] ==  4 )         s +=  223 ;       else if (c[i] ==  5 )         s +=  5 ;       else if (c[i] ==  6 )         s +=  53 ;       else if (c[i] ==  7 )         s +=  7 ;       else if (c[i] ==  8 )         s +=  7222 ;       else if (c[i] ==  9 )         s +=  7332 ;     }     sort(s.begin(), s.end());     reverse(s.begin(), s.end());     return s;   }   int main() {     int n;     string s;     cin >> n >> s;     cout << eq(s);     return 0;   }   