public class Solution
extends Object
846 - Hand of Straights\.
Medium
Alice has some number of cards and she wants to rearrange the cards into groups so that each group is of size `groupSize`, and consists of `groupSize` consecutive cards.
Given an integer array `hand` where `hand[i]` is the value written on the ith card and an integer `groupSize`, return `true` if she can rearrange the cards, or `false` otherwise.
**Example 1:**
**Input:** hand = [1,2,3,6,2,3,4,7,8], groupSize = 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], groupSize = 4
**Output:** false
**Explanation:** Alice's hand can not be rearranged into groups of 4.
**Constraints:**
* 1 <= hand.length <= 104
* 0 <= hand[i] <= 109
* `1 <= groupSize <= hand.length`
**Note:** This question is the same as 1296: [https://leetcode.com/problems/divide-array-in-sets-of-k-consecutive-numbers/](https://leetcode.com/problems/divide-array-in-sets-of-k-consecutive-numbers/)