ProblemaC

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

int main()
{
    int casos, n;
    scanf("%d", &casos);

    for(int i=0; i<casos; i++)
    {
        scanf("%d", &n);

        if(n != 0 && n < 4)
        {
            printf("N\n");
        }
        else
        {
            double raiz = sqrt(n*(n-4));
            double a = (n+raiz)/2;
            double b = (n-raiz)/2;
            printf("Y %.10f %.10f\n", a, b);
        }
    }

    return 0;
}