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package main
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type Coordinate struct {
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X, Y, Z int
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}
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var Zero = Coordinate{X: 0, Y: 0, Z: 0}
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func (c Coordinate) Distance(a Coordinate) int {
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return abs(c.X-a.X) + abs(c.Y-a.Y) + abs(c.Z-a.Z)
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}
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func abs(v int) int {
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if v < 0 {
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return v * -1
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}
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return v
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}
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