Python 基礎知識簡單

尋找數組中的最小元素

「尋找數組中最小元素」問題的詳細指南和 Python 實作。

問題陳述

簡單

寫一個函數 find_smallest(arr) ,它接受整數列表 arr 並傳回最小元素。迭代數組並追蹤迄今為止看到的最小值。

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

範例

Example 1
Input
arr = [3, 7, 2, 8, 1]
Output
1
Explanation

Comparing all elements: 3, 7, 2, 8, 1. The minimum is 1.

Example 2
Input
arr = [-5, -2, -8, -1]
Output
-8
Explanation

Among negative numbers, -8 is the smallest.

Example 3
Input
arr = [42]
Output
42
Explanation

Only one element, so it is the smallest.

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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