#include <iostream>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iomanip>

using namespace std;

void recursive_print(){
    double A; char ch;
    if ((ch = getchar()) != EOF){
        cin >> A;
        recursive_print();
        cout << endl << setiosflags(ios::showpoint | ios::fixed) << setprecision(4) << sqrt(A);
    }
}

int main(){
    recursive_print();
}