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func intersect(nums1 []int, nums2 []int) []int {
intersection1 := []int{}
mapforone := make(map[int]int)
for i := 0; i < len(nums1); i++ {
mapforone[nums1[i]]++
}
for i := 0; i < len(nums2); i++ {
if mapforone[nums2[i]] > 0 {
intersection1 = append(intersection1, nums2[i])
mapforone[nums2[i]]--
}
}
return intersection1
}
