#include <iostream>#include <iomanip>#include <math.h>using namespace std;double a[500000];int main(){	int i = 0;	double n;	while(cin >> n){		a[i++] = n; 		}	while(i--){		double ans = sqrt(a[i]);		cout.precision(4);		cout.setf(ios::fixed);		cout << ans << endl;		}	return 0;}