func main() {

	var i int

	fmt.Scanf("%d", &i)
	fmt.Println(i)

	if i%3 == 0 {
		goto LABLE1
	} else {
		fmt.Println("not zhengchu")
		return
	}
LABLE1:
	for n := 0; n < 3; n++ {
		fmt.Println("lable1:", n)
	}
}

  

 

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