#include<stdio.h>
#include<math.h>
#include<stdlib.h>
#define SIZE 128*1024
long long int num[SIZE];
int main()
{
    int i,n=0;
    long long int N;
    while(scanf("%lld",&N)!=EOF)
          {
              num[n]=N;
            n++;
        }

    for(i=n-1;i>=0;i--){

      printf("%0.4lf\n",(double)sqrt(num[i]));
    }
    return 0;
}