#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main(){
    double sn = 0.99, sp = 0.99, n;
    cin >> n;
    double podds = n / (10000 - n) * 99;
    if (n == 10000) cout << 0 << endl;
    else cout << fixed << setprecision(4) << 100 - (podds / (1+podds) * 100) << endl;
}