#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int main() {
  int n;
  ld p, res = 1, ans = 0;
  cin >> n >> p;
  if (n >= 200) ans = 1;
  else {
    for (int i = 0; i < n; i++) {
      res *= (ld)1 - p;
    }
    ans = (ld)1 - res;
  }
  cout << fixed << setprecision(15) << ans << endl;
  return 0;
}