//please tell me what's wrong, cause i cant understand...

#include <bits/stdc++.h>
#include<fstream>
#define all(a) (a).begin(), (a).end()
#define ll long long
#define sz size
#define dbl double
#define vll vector <ll>
#define INF LLONG_MAX
#define uniq(x) x.resize(unique(begin(x),end(x))-begin(x))
#define forik(i,m,n) for(ll i=m;i<n;++i)
#define re return

using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie();
    vll numbers;
    ll num;
    while (cin >> num) {
        numbers.push_back(num);
    }
    for (ll i = numbers.size() - 1; i >= 0; i--) {
        dbl nek = sqrt(numbers[i]);
        cout << fixed << setprecision(4) << nek << endl;
    }
    re 0;
}