func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     double net, res;     int d, h, vel, e;     cin >> d >> h >> vel >> e;     net = e - (vel / (3.14159265358979323846 * d * d / 4.0));     res = -h / net;     if (res <= 0 || res > 10000)       cout <<  NO n ;     else       cout <<  YES n  << fixed << setprecision(12) << res << endl;     return 0;   }   