/* -*- coding: utf-8 -*-
 *
 * 221.cc: No.221 犯罪都市 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 10000;
const int PN = 1000000;
const int PR = 99;

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n;
  cin >> n;

  double m0 = (double)(PN - PN / 10000 * n) * (100 - PR) / 100;
  double m1 = (double)(PN / 10000 * n) * PR / 100;
  //printf("m0=%lf, m1=%lf\n", m0, m1);

  printf("%.5lf\n", m0 / (m0 + m1) * 100);
  return 0;
}