#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
double a,b,c,d,x;
int main()
{
	cin >> x >> a >> b >> c >> d;
	cout << fixed << setprecision(7) << a * pow(x,3) + b * pow(x,2) + c * x + d;
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	double x,a,b,c,d;
	scanf("%lf %lf %lf %lf %lf",&x,&a,&b,&c,&d);
	double ans=(1.0*a*pow(x,3.0))+(1.0*b*pow(x,2.0))+(1.0*c*x)+d;
	printf("%.7lf",ans);
	return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { double x,a,b,c,d; scanf("%lf %lf %lf %lf %lf",&x,&a,&b,&c,&d); double ans=(1.0apow(x,3.0))+(1.0bpow(x,2.0))+(1.0cx)+d; printf("%.7lf",ans); return 0; }