#include <bits/stdc++.h>
using namespace std;
int main(){
  cout << fixed << setprecision(20);
  int N;
  cin >> N;
  double P;
  cin >> P;
  if (N >= 200){
    cout << 1 << endl;
  } else {
    cout << 1 - pow(1 - P, N) << endl;
  }
}