846. Hand of Straights

Alice has a hand of cards, given as an array of integers.
Now she wants to rearrange the cards into groups so that each group is size W, and consists of Wconsecutive cards.
Return true if and only if she can.
 
1. 
Example 1:
Input: hand = [1,2,3,6,2,3,4,7,8], W = 3
Output: true
Explanation: Alice's hand can be rearranged as [1,2,3],[2,3,4],[6,7,8].
Example 2:
Input: hand = [1,2,3,4,5], W = 4
Output: false
Explanation: Alice's hand can't be rearranged into groups of 4.


https://buptwc.github.io/2018/06/04/Leetcode-846-Hand-of-Straights/

https://leetcode.com/problems/hand-of-straights/solution/


https://leetcode.com/problems/hand-of-straights/discuss/135598/C++JavaPython-O(MlogM)-Complexity

https://www.bilibili.com/video/av24391209/?p=3