#include <bits/stdc++.h> 

using namespace std;
using ll=long long;
using ull=unsigned long long;
using pii=pair<int,int>;

#define INF LONG_MAX
#define MOD1 1000000007
#define MOD2 998244353
#define MOD MOD1
#define rng(a) a.begin(),a.end()
#define rrng(a) a.end(),a.begin()
#define endl "\n"

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    int N;
    double P;
    cin>>N>>P;
    if(N>=200){
        cout<<1<<endl;
        return 0;
    }
    double ans=1;
    for(int i=0;i<N;i++){
        ans*=(1-P);
    }
    cout<<setprecision(20)<<1-ans<<endl;
    return 0;
}