# 350. Find the intersection of two arrays intersection of two Arrays II

Source: Internet
Author: User

Given the arrays, write a function to compute their intersection.

example:
given  Nums1  = `[1, 2, 2, 1] `,   Nums2  = `[2, 2] `, Return `[2, 2] `.

Note:

• Each element of the result should appear as many times as it shows in both arrays.
• The result can be on any order.

• What if the given array is already sorted? How would optimize your algorithm?
• What if nums1' s size is small compared to nums2' s size? Which algorithm is better?
• What if elements of nums2 be stored on disk, and the memory is limited such so you cannot load all elements in To the memory at once?

```

`public class Solution {`

` public int[] Intersect(int[] nums1, int[] nums2) {`

` List<int> list = new List<int>();`

` List<int> intersectList = new List<int>();`

` list = nums1.ToList<int>();`

` int num = 0;`

` int length = nums2.Length;`

` for(int i=0;i<length;i++)`

` {`

` num = nums2[i];`

` if (list.Contains(nums2[i]))`

` {`

` list.Remove(num);`

` intersectList.Add(num);`

` }`

` }`

` int[] intersect = intersectList.ToArray();`

` return intersect;`

` }`

`}`

```

From for notes (Wiz)

350. Find the intersection of two arrays intersection of two Arrays II

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