Python 基礎知識簡單

尋找數組中最大的元素

「尋找陣列中最大元素」問題的詳細指南和 Python 實作。

問題陳述

簡單

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

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
8
Explanation

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

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

Among negative numbers, -1 is the largest.

Example 3
Input
arr = [100]
Output
100
Explanation

Only one element, so it is the largest.

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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