You are given a 0-indexed array nums of size n consisting of non-negative integers.
You need to apply n - 1 operations to this array where, in the ith operation (0-indexed), you will apply the following on the ith element of nums:
nums[i] == nums[i + 1], then multiply nums[i] by 2 and set nums[i + 1] to 0. Otherwise, you skip this operation.After performing all the operations, shift all the 0's to the end of the array.
[1,0,2,0,0,1] after shifting all its 0's to the end, is [1,2,1,0,0,0].Return the resulting array.
\n\nNote that the operations are applied sequentially, not all at once.
\n\n\n
Example 1:
\n\n\nInput: nums = [1,2,2,1,1,0]\nOutput: [1,4,2,0,0,0]\nExplanation: We do the following operations:\n- i = 0: nums[0] and nums[1] are not equal, so we skip this operation.\n- i = 1: nums[1] and nums[2] are equal, we multiply nums[1] by 2 and change nums[2] to 0. The array becomes [1,4,0,1,1,0].\n- i = 2: nums[2] and nums[3] are not equal, so we skip this operation.\n- i = 3: nums[3] and nums[4] are equal, we multiply nums[3] by 2 and change nums[4] to 0. The array becomes [1,4,0,2,0,0].\n- i = 4: nums[4] and nums[5] are equal, we multiply nums[4] by 2 and change nums[5] to 0. The array becomes [1,4,0,2,0,0].\nAfter that, we shift the 0's to the end, which gives the array [1,4,2,0,0,0].\n\n\n
Example 2:
\n\n\nInput: nums = [0,1]\nOutput: [1,0]\nExplanation: No operation can be applied, we just shift the 0 to the end.\n\n\n
\n
Constraints:
\n\n2 <= nums.length <= 20000 <= nums[i] <= 1000给你一个下标从 0 开始的数组 nums ，数组大小为 n ，且由 非负 整数组成。
你需要对数组执行 n - 1 步操作，其中第 i 步操作（从 0 开始计数）要求对 nums 中第 i 个元素执行下述指令：
nums[i] == nums[i + 1] ，则 nums[i] 的值变成原来的 2 倍，nums[i + 1] 的值变成 0 。否则，跳过这步操作。在执行完 全部 操作后，将所有 0 移动 到数组的 末尾 。
[1,0,2,0,0,1] 将所有 0 移动到末尾后变为 [1,2,1,0,0,0] 。返回结果数组。
\n\n注意 操作应当 依次有序 执行，而不是一次性全部执行。
\n\n\n\n
示例 1：
\n\n\n输入：nums = [1,2,2,1,1,0]\n输出：[1,4,2,0,0,0]\n解释：执行以下操作：\n- i = 0: nums[0] 和 nums[1] 不相等，跳过这步操作。\n- i = 1: nums[1] 和 nums[2] 相等，nums[1] 的值变成原来的 2 倍，nums[2] 的值变成 0 。数组变成 [1,4,0,1,1,0] 。\n- i = 2: nums[2] 和 nums[3] 不相等，所以跳过这步操作。\n- i = 3: nums[3] 和 nums[4] 相等，nums[3] 的值变成原来的 2 倍，nums[4] 的值变成 0 。数组变成 [1,4,0,2,0,0] 。\n- i = 4: nums[4] 和 nums[5] 相等，nums[4] 的值变成原来的 2 倍，nums[5] 的值变成 0 。数组变成 [1,4,0,2,0,0] 。\n执行完所有操作后，将 0 全部移动到数组末尾，得到结果数组 [1,4,2,0,0,0] 。\n\n\n
示例 2：
\n\n\n输入：nums = [0,1]\n输出：[1,0]\n解释：无法执行任何操作，只需要将 0 移动到末尾。\n\n\n
\n\n
提示：
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