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// @Title: 找出两数组的不同 (Find the Difference of Two Arrays)
// @Author: 15816537946@163.com
// @Date: 2022-03-27 10:43:56
// @Runtime: 28 ms
// @Memory: 6.9 MB
func findDifference(nums1 []int, nums2 []int) [][]int {
	ret := make([][]int, 2)
	for i := range ret {
		ret[i] = make([]int, 0)
	}

	m1 := make(map[int]int)
	for _, v := range nums1 {
		m1[v]++
	}
	for _, v := range nums2 {
		if _, ok := m1[v]; ok {
			delete(m1, v)
		}
	}
	for k := range m1 {
		ret[0] = append(ret[0], k)
	}

	m1 = make(map[int]int)
	for _, v := range nums2 {
		m1[v]++
	}
	for _, v := range nums1 {
		if _, ok := m1[v]; ok {
			delete(m1, v)
		}
	}
	for k := range m1 {
		ret[1] = append(ret[1], k)
	}

	return ret

}