Input: grid = [[1,2],[3,4]]
\n\nOutput: [1,4]
\n\nExplanation:
\n\n![\"\"](\"https://assets.leetcode.com/uploads/2024/11/23/4012_example0.png\")
You are given an m x n 2D array grid of positive integers.
Your task is to traverse grid in a zigzag pattern while skipping every alternate cell.
Zigzag pattern traversal is defined as following the below actions:
\n\n(0, 0).Note that you must skip every alternate cell during the traversal.
\n\nReturn an array of integers result containing, in order, the value of the cells visited during the zigzag traversal with skips.
\n
Example 1:
\n\nInput: grid = [[1,2],[3,4]]
\n\nOutput: [1,4]
\n\nExplanation:
\n\n
Example 2:
\n\nInput: grid = [[2,1],[2,1],[2,1]]
\n\nOutput: [2,1,2]
\n\nExplanation:
\n\n![\"\"](\"https://assets.leetcode.com/uploads/2024/11/23/4012_example1.png\")
Example 3:
\n\nInput: grid = [[1,2,3],[4,5,6],[7,8,9]]
\n\nOutput: [1,3,5,7,9]
\n\nExplanation:
\n\n![\"\"](\"https://assets.leetcode.com/uploads/2024/11/23/4012_example2.png\")
\n
Constraints:
\n\n2 <= n == grid.length <= 502 <= m == grid[i].length <= 501 <= grid[i][j] <= 2500给你一个 m x n 的二维数组 grid，数组由 正整数 组成。
你的任务是以 之字形 遍历 grid，同时跳过每个 交替 的单元格。
之字形遍历的定义如下：
\n\n(0, 0) 开始。注意：在遍历过程中，必须跳过每个 交替 的单元格。
\n\n返回一个整数数组 result，其中包含按 顺序 记录的、且跳过交替单元格后的之字形遍历中访问到的单元格值。
\n\n
示例 1：
\n\n输入： grid = [[1,2],[3,4]]
\n\n输出： [1,4]
\n\n解释：
\n\n
示例 2：
\n\n输入： grid = [[2,1],[2,1],[2,1]]
\n\n输出： [2,1,2]
\n\n解释：
\n\n
示例 3：
\n\n输入： grid = [[1,2,3],[4,5,6],[7,8,9]]
\n\n输出： [1,3,5,7,9]
\n\n解释：
\n\n
\n\n
提示：
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