#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using i64 = long long;
using u64 = unsigned long long;
using i32 = int;
using u32 = unsigned int;
#define rep(i,n) for(int i=0; i<(n); i++)


int main() {
    int N; cin >> N;
    double P; cin >> P;
    if(N >= 200){ cout << "1" << endl; return 0; }
    double ans = 1.0;
    rep(i,N) ans *= (1 - P);
    cout.precision(10);
    cout << fixed;
    cout << (1.0 - ans) << endl;
    return 0;
}



struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;