摘要：
There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following re 阅读全文
摘要：
There are N gas stations along a circular route, where the amount of gas at station i isgas[i]. You have a car with an unlimited gas tank and it costs 阅读全文
摘要：
Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull. Follow up:Can you solve it without using extra space? 给 阅读全文
摘要：
Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→… You must do this in-place without altering the nodes' values. For 阅读全文