摘要：
题目：Given a linked list, remove the nth node from the end of list and return its head. For example, Note:Given n will always be valid.Try to do this in 阅读全文
摘要：
题目：Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three intege 阅读全文
摘要：
题目：Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum 阅读全文
摘要：
题目：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 en 阅读全文