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

int main(void)
{
    int i = 0;
    unsigned long long a;
    double b[1024];

    while (EOF != scanf("%Ld", &a))
    {
        b[i++] = sqrt(a);
    }

    while (i--)
        printf("%.4f\n", b[i]);

    return 0;
}

Edited by author 22.12.2013 21:56