Hand of Straights

Medium

Given an array hand of card values and a group size k (LeetCode: groupSize), return true if the cards can be rearranged into groups of k consecutive cards.

Example 1

Input:  hand = [1,2,3,6,2,3,4,7,8], k = 3
Output: true

Example 2

Input:  hand = [1,2,3,4,5], k = 4
Output: false

Constraints

• 1 <= hand.length <= 10^4
• 0 <= hand[i] <= 10^9
• 1 <= k