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- * We define a harmonious array as an array where the difference between its
- * maximum value and its minimum value is exactly `1`.
- *
- * Given an integer array `nums`, return the length of its longest harmonious
- * subsequence among all its possible subsequences.
- *
- * A subsequence of array is a sequence that can be derived from the array by
- * deleting some or no elements without changing the order of the remaining
- * elements.
- *
- * Example 1:
- * Input: nums = [1,3,2,2,5,2,3,7]
- * Output: 5
- * Explanation: The longest harmonious subsequence is [3,2,2,2,3].
- *
- * Example 2:
- * Input: [1,2,3,4]
- * Output: 2
- *
- * Example 3:
- * Input: [1,1,1,1]
- * Output: 0
- *
- * Example: 4
- * Input: [1,3,5,7,9,11,13,15,17]
- * Output: 0
- */

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