#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ double x,a,b,c,d; cin>>x>>a>>b>>c>>d; double sum=a*x*x*x+b*x*x+c*x+d; printf("%.5lf\n",sum); return 0; }