一本通1012

​//qf
#include <bits/stdc++.h>
#define f(i,j,n) for(register int i=j;i<=n;i++)
using namespace std;
typedef long long ll;
inline ll read() {
	ll x=0;
	int f=1;
	char ch=getchar();
	while(!isdigit(ch)) {
		if(ch=='-') f=-1;
		ch=getchar();
	}
	while(isdigit(ch)) x=(x<<1)+(x<<3)+(ch-48),ch=getchar();
	return x*f;
}
double a,b,c,d,x;
inline double pow(int k){
	double ans=1;
	while(k--) ans*=x;
	return ans;
}
signed main() {
	cin>>x>>a>>b>>c>>d;
	cout<<fixed<<setprecision(7)<<a*pow(3)+b*pow(2)+c*pow(1)+d<<endl;
	return 0;
}