guyuan002的博客

真的没意思的一道题，刚开始还想用stack做，后来只能感叹python的强大，直接反转字符串，核心代码就是[::-1] class Solution: def reverse(self, x: int) -> int: if x > -10 and x < 10: return x sign = 1 ...

Leetcode 用链表相加两个数 You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two nu...

Given a string, find the length of the longest substring without repeating characters. Example 1: Input: “abcabcbb” Output: 3 Explanation: The answer is “abc”, with the length of 3. Example 2: Input: ...

问题： Given n non-negative integers a1, a2, …, an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find t...