func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI = acos(-1);   int main() {     double d, h, v, e;     while (scanf( %lf%lf%lf%lf , &d, &h, &v, &e) != EOF) {       double t = v / (PI * (d / 2) * (d / 2));       if (t > e) {         printf( YES n );         double ti = h / (t - e);         printf( %lf n , ti);       } else         printf( NO n );     }     return 0;   }   