func_code_string: #include <bits/stdc++.h>   using namespace std;   string s1, s2;   int main() {     cin >> s1 >> s2;     if (s1.length() != s2.length())       cout <<  NO ;     else {       int x = 0;       int y = 0;       for (int i = 0; i < s1.length(); i++) {         if (s1[i] -  0  == 1) x++;         if (s2[i] -  0  == 1) y++;       }       if (x == 0 && y == 0)         cout <<  YES ;       else if (x == 0 && y != 0)         cout <<  NO ;       else if (x != 0 && y == 0)         cout <<  NO ;       else if (x != 0 && y != 0)         cout <<  YES ;     }     return 0;   }   