int a[5];
int poly(int x)
{
    int i=0;
    int sum=0;
    while(i<5)
    {
        sum = sum * x + a[4-i];
        i = i + 1;
    }
    return sum;
}
int main()
{
    int x;
    x = getint();
    int i = 0;
    while(i < 5)
    {
        a[i] = getint();
        i = i + 1;
    }
    return poly(x);
}