#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    int N;
    cin >> N;
    if (N >= 200){
        cout << 1 << endl;
        return 0;
    }
    long double P, Q=1;
    cin >> P;
    for (int i=0; i<N; i++) Q *= (1.l-P);
    cout << setprecision(18) << 1-Q << endl;

    return 0;
}