#include<bits/stdc++.h> using namespace std; double Hs(double x,double a,double b,double c,double d) { double ans; ans=a*x*x*x+b*x*x+c*x+d; return ans; } int main() { double x,a,b,c,d; cin>>x>>a>>b>>c>>d; printf("%.5lf",Hs(x,a,b,c,d)); return 0; }