#include <bits/stdc++.h>
using namespace std;
int main() {
    int N; cin >> N;
    double P; cin >> P;
    if (N >= 200) cout << 1 << endl;
    else {
        double ans = 1;
        while (N--) {
            ans *= (1.00 - P);
        }
        cout << fixed << setprecision(12) << 1 - ans << endl;
    }
}