#include <iostream>
#include <algorithm>
#include <functional>
#include <string>
#include <climits>
#include <vector>
#include <numeric>
#include <complex>
using namespace std;

#define long __int64
//#define __int64 long long
#define REP(i,a,b) for(int i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)
const int Vecy[4] = {0,-1,0,1};
const int Vecx[4] = {1,0,-1,0};

int main(){
	double n;
	double ans;
	double ot,xt;
	cin >> n;
	
	ot = 1000000 * (n/10000) * 0.99;
	xt = 1000000 * (1-n/10000) * 0.01;
	//cout << ot << "," << xt << endl;
	
	ans = xt / (ot + xt) * 100;
	cout << ans << endl;
	
    
    return 0;
}