#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
    vector<ll>v;
    ll a;
    while(cin>>a)
        v.push_back(a);
    for(int i=v.size()-1;i>=0;i--)
        cout<<fixed<<setprecision(4)<<sqrt(v[i])<<endl;
    return 0;
}