#include <iostream>
using namespace std;
#include <cstdio>
#include <string.h>
#include <stdlib.h>
#include <math.h>

typedef long long ll;
typedef long double lb;

int l[3];


int main(void)
{
   int i,j,k,l;
   int memory[2];
   int n;
   lb  criminal,citizen;
   lb all;
   
   cin >> n;

   criminal = n*(long double)0.99;
   citizen = (10000-n)*0.01;
   all = criminal + citizen;
   printf("%llf\n",citizen/all*100);

   return 0;
}