#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cctype>
#include<cstdlib>
#include<algorithm>
#include<bitset>
#include<vector>
#include<list>
#include<deque>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<cmath>
#include<sstream>
#include<fstream>
#include<iomanip>
#include<ctime>
#include<complex>
#include<functional>
#include<climits>
#include<cassert>
#include<iterator>
using namespace std;
#define MAX 1000000
int N = MAX;
int main(){
	int n;
	scanf("%d", &n);
	n *= 100;
	double NN = n;  //real
	NN *= 0.99;
	double nn = N-n;
	nn *= 0.01;
	double sum = NN + nn;
	sum = nn / sum;
	sum *= 100.0;
	printf("%.5f\n", sum);
//	cout << sum << endl;
	//printf("%16f\n", sum);
	return 0;
}