#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
    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<<fixed<<setprecision(15)<<1-ans<<endl;
}