You are given an integer array nums. Each element in nums is 1, 2 or 3. In each operation, you can remove an element from nums. Return the minimum number of operations to make nums non-decreasing.
\n
Example 1:
\n\nInput: nums = [2,1,3,2,1]
\n\nOutput: 3
\n\nExplanation:
\n\nOne of the optimal solutions is to remove nums[0], nums[2] and nums[3].
Example 2:
\n\nInput: nums = [1,3,2,1,3,3]
\n\nOutput: 2
\n\nExplanation:
\n\nOne of the optimal solutions is to remove nums[1] and nums[2].
Example 3:
\n\nInput: nums = [2,2,2,2,3,3]
\n\nOutput: 0
\n\nExplanation:
\n\nnums is already non-decreasing.
\n
Constraints:
\n\n1 <= nums.length <= 1001 <= nums[i] <= 3\nFollow-up: Can you come up with an algorithm that runs in
O(n) time complexity?",
"translatedTitle": "将三个组排序",
"translatedContent": "给你一个整数数组 nums 。nums 的每个元素是 1，2 或 3。在每次操作中，你可以删除 nums 中的一个元素。返回使 nums 成为 非递减 顺序所需操作数的 最小值。
\n\n
示例 1：
\n\n\n输入：nums = [2,1,3,2,1]\n输出：3\n解释：\n其中一个最优方案是删除 nums[0]，nums[2] 和 nums[3]。\n\n\n
示例 2：
\n\n\n输入：nums = [1,3,2,1,3,3]\n输出：2\n解释：\n其中一个最优方案是删除 nums[1] 和 nums[2]。\n\n\n
示例 3：
\n\n\n输入：nums = [2,2,2,2,3,3]\n输出：0\n解释：\nnums 已是非递减顺序的。\n\n\n
\n\n
提示：
\n\n1 <= nums.length <= 1001 <= nums[i] <= 3进阶：你可以使用 O(n) 时间复杂度以内的算法解决吗？
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