func_code_string: #include <bits/stdc++.h>   using namespace std;   int heap(int a, int t) {     int tmp;     if (a > t) swap(a, t);     if (t % a == 0) return a;     return heap(a, t % a);   }   int main() {     string x, y;     cin >> x >> y;     bool f = true;     for (int i = 0; i < x.size(); i++) {       if (x[i] != y[x.size() - 1 - i]) f = false;     }     if (f)       cout <<  YES  << endl;     else       cout <<  NO  << endl;     return 0;   }   