LeetCode 题解工作台

两整数相加

给你两个整数 num1 和 num2 ,返回这两个整数的和。 示例 1: 输入: num1 = 12, num2 = 5 输出: 17 解释: num1 是 12,num2 是 5 ,它们的和是 12 + 5 = 17 ,因此返回 17 。 示例 2: 输入: num1 = -10, num2 = …

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相关题

当前训练重点

简单 · 数学·driven

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答案摘要

我们可以直接使用加法运算符 `+` 来计算两个整数的和。 时间复杂度 ,空间复杂度 。

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description

题目描述

给你两个整数 num1num2,返回这两个整数的和。

 

示例 1:

输入:num1 = 12, num2 = 5
输出:17
解释:num1 是 12,num2 是 5 ,它们的和是 12 + 5 = 17 ,因此返回 17 。

示例 2:

输入:num1 = -10, num2 = 4
输出:-6
解释:num1 + num2 = -6 ,因此返回 -6 。

 

提示:

  • -100 <= num1, num2 <= 100
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解题思路

方法一:使用加法运算符

我们可以直接使用加法运算符 + 来计算两个整数的和。

时间复杂度 O(1)O(1),空间复杂度 O(1)O(1)

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class Solution:
    def sum(self, num1: int, num2: int) -> int:
        return num1 + num2
speed

复杂度分析

指标
时间Depends on the final approach
空间Depends on the final approach
psychology

面试官常问的追问

外企场景
  • question_mark

    The candidate should demonstrate an understanding of basic integer operations.

  • question_mark

    The candidate may be asked about edge cases and how integer overflow is handled.

  • question_mark

    The candidate should be able to explain the efficiency of their approach.

warning

常见陷阱

外企场景
  • error

    Forgetting to handle edge cases such as extreme negative or positive values.

  • error

    Overcomplicating the solution by introducing unnecessary logic for the addition operation.

  • error

    Not taking advantage of the simple nature of the problem, leading to overly complex solutions.

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进阶变体

外企场景
  • arrow_right_alt

    What if the input numbers are very large? The principle still holds, though overflow might need consideration in some languages.

  • arrow_right_alt

    How would you approach this problem if you had to add more than two integers?

  • arrow_right_alt

    How might this problem change if the range of integers was significantly larger?

help

常见问题

外企场景

两整数相加题解:数学·driven | LeetCode #2235 简单