#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  double p;
  cin >> n >> p;
  cout << fixed << setprecision(15);
  if (n >= 200) cout << 1.0 << endl;
  else {
    double ans = 1;
    rep(_, n) ans *= 1 - p;
    cout << 1 - ans << endl;
  }
  return 0;
}