/* -*- coding: utf-8 -*-
 *
 * 1807.cc:  No.1807 UMA Gacha - yukicoder
 */

#include<cstdio>
#include<cmath>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n;
  double p;
  scanf("%d%lf", &n, &p);

  if (n >= 200) puts("1");
  else {
    double q = 1.0 - pow(1.0 - p, n);
    printf("%.10lf\n", q);
  }
  return 0;
}