#include <stdio.h>
#include <math.h>

int main(void)
{
    long long number[1000000];
    int i=0,k;
    while(scanf("%lld", &number[i++]) == 1);

    k=i-1;

    while(k>0)
    {
         printf("%.4lf\n", sqrt((double)number[--k]));
    }

    return 0;

}

while(scanf("%lld", &number[i++]) != EOF){/*...*/}