Python 基础知识简单

查找数组中的最小元素

“查找数组中最小元素”问题的详细指南和 Python 实现。

问题陈述

简单

编写一个函数 find_smallest(arr) ,它接受整数列表 arr 并返回最小元素。迭代数组并跟踪迄今为止看到的最小值。

约束条件
  • 1 <= len(arr) <= 10^5
  • -10^9 <= arr[i] <= 10^9

示例

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?
考虑使用特定于数组的数据结构,例如集合或堆。
Edge Cases to Watch
  • 空输入结构
  • 单元素输入
  • 大数值范围

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