摘要：
You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?解题思路：将每个[i, j]对应旋转对... 阅读全文
摘要：
According to theWikipedia's article: "TheGame of Life, also known simply asLife, is a cellular automaton devised by the British mathematician John Hor... 阅读全文
摘要：
Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.click to show follow up.Follow up:Did you use extra space?A s... 阅读全文
摘要：
Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Note:Do not modify the linked list.Follow up:Can you sol... 阅读全文
摘要：
Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?解题思路：If we have 2 pointers - fast and slow... 阅读全文