func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(0);     string a, b;     cin >> a >> b;     if (a.size() == b.size()) {       int ca = 0, cb = 0;       for (int i = 0; i < a.size(); i++) {         ca += a[i] ==  1 ;         cb += b[i] ==  1 ;       }       if (!ca && cb || ca && !cb)         cout <<  NO ;       else         cout <<  YES ;     } else       cout <<  NO ;     return 0;   }   