#pragma comment(linker, "/STACK:16777216")

#include <stdio.h>
#include <math.h>
int main()
{
long long a[200000];
int i=0;

while (  scanf("%I64u", &a[i++]) != EOF ) ;

do
   printf("%.4lf\n", sqrt( double(a[--i]) ) );
while (i);
        return 0;
}