/*
 * Author: nskybytskyi
 * Time:   2022-01-13 15:08:45
 */

#include <bits/stdc++.h>
using namespace std;

int main() {
  cin.tie(0)->sync_with_stdio(0);

  int n;
  cin >> n;

  long double p;
  cin >> p;

  long double q = 1;
  for (int i = 0; i < n; ++i) {
    q *= 1 - p;
  }

  if (n >= 200) {
    cout << 1 << "\n";
  } else {
    cout << fixed << setprecision(10) << 1 - q;
  }

  return 0;
}