#2460
Apply Operations to an Array
newbie · 235 · lc easy +18 · verified · 74.7% accepted · 1,134 likes · top 85%
Description
Given a 0-indexed array nums of size n, apply n - 1 operations in order. In operation i (0-indexed), if nums[i] == nums[i + 1], multiply nums[i] by 2 and set nums[i + 1] = 0. After all operations, move every 0 to the end while preserving the relative order of non-zero elements.
Return the resulting array.
Example 1:
Input: nums = [1,2,2,1,1,0]
Output: [1,4,2,0,0,0]
Explanation: We do the following operations:
- i = 0: nums[0] and nums[1] are not equal, so we skip this operation.
- 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].
- i = 2: nums[2] and nums[3] are not equal, so we skip this operation.
- 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].
- 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].
After that, we shift the 0's to the end, which gives the array [1,4,2,0,0,0].
Example 2:
Input: nums = [0,1]
Output: [1,0]
Explanation: No operation can be applied, we just shift the 0 to the end.
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