# include<cstdio> # include<iostream> using namespace std; int main(){ double a,b,c,d,x,fx; scanf("%lf%lf%lf%lf%lf",&x,&a,&b,&c,&d); fx = a*x*x*x+b*x*x+c*x+d; printf("%.5lf",fx); return 0; }