#include <iostream>
#include <cstdio>
#include <cmath>

using namespace std;

long long i,j=0;
double a[100000000];
double x;

int main ()
{
    while (cin>>i)
          {
          a[j]=sqrt((double)(i));
          j++;
          }
    for (i=j-1;i>=0;i--)
        {
        x=(long long)(a[i]*10000+0.5)/10000;
        printf ("%0.4lf",a[i]);
        }
    return (0);
}

I have already AC