#include <bits/stdc++.h> using namespace std; using ll = long long; using P = pair<ll,ll>; #define rep(i, n) for(int i = 0; i < n; i++) #define all(x) (x).begin(),(x).end() template<class T>bool chmin(T&a, const T&b){if(a>b){a=b;return 1;}return 0;} template<class T>bool chmax(T&a, const T&b){if(a<b){a=b;return 1;}return 0;} int main(){ int n; double p,ans = 1; cin >> n >> p; if(n<200){ rep(i,n) ans *= (1-p); }else ans = 0; printf("%.12lf\n",1-ans); return 0; }