#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    double p;
    cin >> n >> p;
    double out = 1;
    if(n >= 200) out = 1;
    else {
        for(int i=0;i<n;i++) {
            out *= (1 - p);
        }
        out = 1 - out;
    }

    cout << setprecision(10) << out << '\n';

    return 0;
}