Timus 1001

#include <bits/stdc++.h>
#include<stack>
#include<cmath>
using namespace std;
int main()
{
    stack<double>stk;
    unsigned long long x;
    while(scanf("%llu",&x)!=EOF){
    stk.push(x);
    }
    while(!stk.empty()){

         cout<<fixed<<setprecision(4)<<sqrt(stk.top())<<endl;
        stk.pop();
    }
    return 0;
}