- Difficulty: Easy
- Tags: LeetCode, Easy, Array, Hash Table, Math, Counting, Number Theory, leetcode-914, O(n * (logn)^2), O(n)
Problem
You are given an integer array deck where deck[i] represents the number written on the ith card.
Partition the cards into one or more groups such that:
- Each group has exactly
xcards wherex > 1, and - All the cards in one group have the same integer written on them.
Return true if such partition is possible, or false otherwise.
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 <= 1040 <= deck[i] < 104