You are given an integer array nums.
A subarray is called balanced if the number of distinct even numbers in the subarray is equal to the number of distinct odd numbers.
\n\nReturn the length of the longest balanced subarray.
\n\n\n
Example 1:
\n\nInput: nums = [2,5,4,3]
\n\nOutput: 4
\n\nExplanation:
\n\n[2, 5, 4, 3].[2, 4] and 2 distinct odd numbers [5, 3]. Thus, the answer is 4.Example 2:
\n\nInput: nums = [3,2,2,5,4]
\n\nOutput: 5
\n\nExplanation:
\n\n[3, 2, 2, 5, 4].[2, 4] and 2 distinct odd numbers [3, 5]. Thus, the answer is 5.Example 3:
\n\nInput: nums = [1,2,3,2]
\n\nOutput: 3
\n\nExplanation:
\n\n[2, 3, 2].[2] and 1 distinct odd number [3]. Thus, the answer is 3.\n
Constraints:
\n\n1 <= nums.length <= 15001 <= nums[i] <= 105给你一个整数数组 nums。
如果子数组中 不同偶数 的数量等于 不同奇数 的数量，则称该 子数组 是 平衡的 。
\n\n返回 最长 平衡子数组的长度。
\n\n子数组 是数组中连续且 非空 的一段元素序列。
\n\n\n\n
示例 1:
\n\n输入: nums = [2,5,4,3]
\n\n输出: 4
\n\n解释:
\n\n[2, 5, 4, 3]。[2, 4] 和 2 个不同的奇数 [5, 3]。因此，答案是 4 。示例 2:
\n\n输入: nums = [3,2,2,5,4]
\n\n输出: 5
\n\n解释:
\n\n[3, 2, 2, 5, 4] 。[2, 4] 和 2 个不同的奇数 [3, 5]。因此，答案是 5。示例 3:
\n\n输入: nums = [1,2,3,2]
\n\n输出: 3
\n\n解释:
\n\n[2, 3, 2]。[2] 和 1 个不同的奇数 [3]。因此，答案是 3。\n\n
提示:
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