摘要：1. 反转链表：Leetcode 206 Approach 1: 使用2个指针 Beats: 89.94% Approach 2: 递归 Beats: 66.67% 2. 回文链表： Leetcode 234 Given a singly linked list, determine if it i 阅读全文

摘要：54. Spiral Matrix [Medium] Description Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. Exampl 阅读全文

摘要：55. Jump Game Description Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the a 阅读全文

摘要：35. Search Insert Position Description Given a sorted array and a target value, return the index if the target is found. If not, return the index wher 阅读全文

摘要：Description Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", wh 阅读全文

摘要：Description You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their 阅读全文

摘要：Description Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input w 阅读全文