def GCD(x, y):
 x = abs(x)
 y = abs(y)
 while (x > 0):
  (x, y) = ((y % x), x)
 return y

def GCD ( x , y ) : x = abs ( x ) y = abs ( y ) while ( x > 0 ) : ( x , y ) = ( ( y % x ) , x ) return y
gcd: long return the gcd of x and y .