12312

#include <bits/stdc++.h>

using namespace std;

int main(void) {
    double x, a, b, c, d;
    double f;
    cin >> x >> a >> b >> c >> d;
    f = a * x * x * x + b * x * x + c * x + d;

    printf("%.7lf",f);
    return 0;
}