#include <stdio.h>
#include <math.h>
int i,n;
long long nr[10000];
double numar;
int main()
{
	while (stdin)
		{
		n++;
		scanf("%lld",&nr[n]);
		}
	for (i=n;i;i--)
		{
		 numar=sqrt(nr[i]);
		 printf("%.4f\n",numar);
		}
	return 0;
}