Python 基礎知識簡單

反轉數組

“反轉數組”問題的詳細指南和 Python 實作。

問題陳述

簡單

寫一個函數 reverse_array(arr) ,它接受整數列表 arr 並傳回一個新列表,其中元素以相反順序排列。例如,[1,2,3] 變成 [3,2,1]。

約束條件
  • 0 <= len(arr) <= 10^5
  • -10^9 <= arr[i] <= 10^9

範例

Example 1
Input
arr = [1, 2, 3, 4, 5]
Output
[5, 4, 3, 2, 1]
Explanation

The elements are reversed: first becomes last and last becomes first.

Example 2
Input
arr = [10, 20]
Output
[20, 10]
Explanation

Two elements swapped.

Example 3
Input
arr = [7]
Output
[7]
Explanation

Single element array reversed is the same.

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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