#include <iostream>
#include <math.h>
#include <vector>
#include <stdlib.h>

using namespace std;
int main() {
    vector<double> v;
    long long v1;
    while((cin>>v1))
    {
        v.push_back(v1);
    }
    int size = v.size();
    int first = v[0];
    int last = v[size-1];
    for(int i = size-1; i>=0; i--)
    {
        double a = sqrt(v[i]);
        printf("%.4lf\n", a);
    }
    return 0;
}