#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;


int main()
{
    ll n;
    double p, ans;
    cin >> n >> p;
    cout << fixed << setprecision(7);
    ans = (1 - pow((1-p), n));
    cout << ((n >= 200) ? 1 : ans) << endl;
}