摘要： description: Given n non negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that 阅读全文

摘要： description: Given a sorted array nums, remove the duplicates in place such that each element appear only once and return the new length. Do not alloc 阅读全文

摘要： description: Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less tha 阅读全文

摘要： description: Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes its 阅读全文

摘要： description: Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Note: Example: my answer: "感恩" 两个两个合并， 阅读全文