914. X of a Kind in a Deck of Cards LeetCode Solution | Easy Approach

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 X of a Kind in a Deck of Cards In a deck of cards, each card has an integer written on it.

Return true if and only if you can choose X >= 2 such that it is possible to split the entire deck into 1 or more groups of cards, where:

  • Each group has exactly X cards.
  • All the cards in each group have the same integer.

Example 1:

Input: deck = [1,2,3,4,4,3,2,1]
Output: true
Explanation: Possible partition [1,1],[2,2],[3,3],[4,4].

Example 2:

Input: deck = [1,1,1,2,2,2,3,3]
Output: false
Explanation: No possible partition.

Constraints:

  • 1 <= deck.length <= 104
  • 0 <= deck[i] < 104

 X of a Kind in a Deck of Cards Solutions

Time: O(n)
Space: O(n)

C++

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