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
W consecutive cards.
true if and only if she can.
Input: hand = [1,2,3,6,2,3,4,7,8], W = 3 Output: true Explanation: Alice's
handcan be rearranged as
Input: hand = [1,2,3,4,5], W = 4 Output: false Explanation: Alice's
handcan't be rearranged into groups of
1 <= hand.length <= 10000
0 <= hand[i] <= 10^9
1 <= W <= hand.length