func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     double d, h, v, e;     while (~scanf( %lf%lf%lf%lf , &d, &h, &v, &e)) {       double v1, v2;       v1 = (d / 2) * (d / 2) * 3.1415927 * e;       v2 = (d / 2) * (d / 2) * 3.1415927 * h;       if (v1 >= v)         printf( NO n );       else {         double time = v2 / (v - v1);         printf( YES n );         printf( %lf n , time);       }     }     return 0;   }   