POJ 2405 Beavergnaw G++

#include <iostream>#include <cmath>#include <vector> #include <iomanip>using namespace std;#define PI 3.1415926539//const double PI = acos(-1.0);//谢谢博友文章 int main(){vector<double> jg;while(1){int a,b;cin>>a>>b;if((a==0)&&(b==0)){break;}jg.push_back(pow(a*a*a-(6*b)/PI,1.0/3));}cout <<setprecision(3) <<std::fixed;for(int i=0;i<jg.size();i++){cout<<jg[i]<<endl;}return 0;}