Divide Array Into Equal Pairs: Check Even Counts
Can an array be divided into pairs where each pair has equal elements? Count frequencies, check if all are even. If yes, return true; otherwise, false.
2206. Divide Array Into Equal Pairs Difficulty: Easy Topics: Array, Hash Table, Bit Manipulation, Counting You are given an integer array nums consisting of 2 * n integers. You need to divide nums into n pairs such that: Each element belongs to exactly one pair. The elements present in a pair are equal. Return true if nums can be divided into n pairs, otherwise return false. Example 1: Input: nums = [3,2,3,2,2,2] Output: true Explanation: There are 6 elements in nums, so they should be divided into 6 / 2 = 3 pairs. If nums is divided into the pairs (2, 2), (3, 3), and (2, 2), it will satis...