#include <stdio.h>

int main()
{
    int a;
    double ans;
    double k;
    double b;
    ans = 0;
    scanf("%d %lf", &a, &b);
    ans = (1.0 - b);
    for (int i = 0; i <= b; i++)
    {
        ans = ans * b;
    }
    if (a == 200)
    {
        printf("1");
    }
    else
    {
        printf("%f", ans+b);
    }
}