摘要：
描述Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoringcases.For example,”A man, a plan, a canal: Pan 阅读全文
摘要：
描述Given an array of integers, every element appears three times except for one. Find that single one.Note: Your algorithm should have a linear runtime 阅读全文
摘要：
Single Number描述Given an array of integers, every element appears twice except for one. Find that single one.Note: Your algorithm should have a linear 阅读全文
摘要：
描述Follow up for ”Search in Rotated Sorted Array”: What if duplicates are allowed?Would this affect the run-time complexity? How and why?Write a functi 阅读全文
摘要：
描述Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).You are given a target va 阅读全文
摘要：
描述Given a sorted array, remove the duplicates in place such that each element appear onlyonce and return the new length.Do not allocate extra space fo 阅读全文
摘要：
Remove Duplicates from Sorted Array II描述Follow up for ”Remove Duplicates”: What if duplicates are allowed at most twice?For example, Given sorted arra 阅读全文