摘要：题目Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters ... 阅读全文

摘要：题目You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a singl... 阅读全文

摘要：题目：Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two... 阅读全文

摘要：问题描述如下：Given a linked list, return the node where the cycle begins. If there is no cycle, return null.Follow up:Can you solve it without using extra s... 阅读全文

摘要：题目：Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:getandset.get(key)- Get the v... 阅读全文