#include <iostream>
#include <vector>
#include <cmath>

using namespace std;

int main() {

    double number;
    vector<double> numbers;

    while (cin >> number)
        numbers.push_back(number);

    cout.precision(4);
    cout.setf(std::ios::fixed);

    for (auto iter = numbers.rbegin(); iter != numbers.rend(); ++iter)
        cout << sqrt(*iter) << endl;

    return 0;
}