DSA 部分簡單

波形排序

“波形排序”問題的詳細指南和 Python 實作。

問題陳述

簡單

寫一個函數 wave_sort(arr),對整數陣列 arr 進行就地排序或以波形形式傳回排序後的版本,例如 arr[0] >= arr[1] <= arr[2] >= arr[3] <= arr[4]...

約束條件
  • 1 <= len(arr) <= 1000
  • -10^4 <= arr[i] <= 10^4

範例

Example 1
Input
arr = [10, 5, 6, 3, 2, 20, 100, 80]
Output
[10, 5, 6, 2, 20, 3, 100, 80]
Explanation

The output elements satisfy wave pattern: 10 >= 5 <= 6 >= 2 <= 20 >= 3 <= 100 >= 80.

Need a Hint?
考慮使用特定於數組的資料結構,例如集合或堆。
Edge Cases to Watch
  • 空輸入結構
  • 單元素輸入
  • 大數值範圍

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