#include <math.h>
#include <iostream>
using namespace std;

int main()
{
    double *a = new double[131073];
    double temp;
    int i = 0;
    while (cin >> temp) a[i++] = sqrt(temp);
    while (i > 0)
    {
        printf("%.4f\n", a[--i]);
    }
    delete[] a;
    return 0;
}