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

int main() {
    int N;
    long double P;
    cin >> N >> P;
    if(N >= 200) {
        cout << 1 << endl;
    }
    else {
        long double ans = 1;
        for(int i = 0; i < N; i++) {
            ans *= 1-P;
        }
        cout << fixed << setprecision(18) << 1-ans << endl;
    }
}