package q1116

type void struct{}

type ZeroEvenOdd struct {
	n          int
	c0, c1, c2 chan void
}

func NewZeroEvenOdd(n int) *ZeroEvenOdd {
	zeo := &ZeroEvenOdd{
		n:  n,
		c0: make(chan void, 1),
		c1: make(chan void, 1),
		c2: make(chan void, 1),
	}
	zeo.c0 <- void{}
	return zeo
}

func (z *ZeroEvenOdd) Zero(printNumber func(int)) {
	for i := range z.n {
		<-z.c0
		printNumber(0)
		if (i+1)%2 == 0 {
			z.c2 <- void{}
		} else {
			z.c1 <- void{}
		}
	}
}

func (z *ZeroEvenOdd) Even(printNumber func(int)) {
	for i := range z.n {
		if (i+1)%2 != 0 {
			continue
		}
		<-z.c2
		printNumber(i + 1)
		z.c0 <- void{}
	}
}

func (z *ZeroEvenOdd) Odd(printNumber func(int)) {
	for i := range z.n {
		if (i+1)%2 == 0 {
			continue
		}
		<-z.c1
		printNumber(i + 1)
		z.c0 <- void{}
	}
}