package main

type Coordinate struct {
	X, Y, Z int
}

var Zero = Coordinate{X: 0, Y: 0, Z: 0}

func (c Coordinate) Distance(a Coordinate) int {
	return abs(c.X-a.X) + abs(c.Y-a.Y) + abs(c.Z-a.Z)
}

func abs(v int) int {
	if v < 0 {
		return v * -1
	}
	return v
}