#include "stdio.h"
#include "math.h"
int main()
{
double x=0; printf("input X: ");
scanf("%lf", &x);
double y=0; printf("input Y: ");
scanf("%lf", &y);
double b = sqrt(abs(x-1)- pow(y, 1.0 / 3.0));
double c = 1 + (x / 2) + (y / 4);
double a = b / c;
printf("a =%lf \n", a);
}