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125. Valid Palindrome
题目 Given a string, determine if it is a palindrome, considering only alphanumeric chara...
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153. Find Minimum in Rotated Sorted Array
题目 Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1...
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19. Remove Nth Node From End of List
题目 Given a linked list, remove the nthnode from the end of list and return its head.For...
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345. Reverse Vowels of a String
题目 Write a function that takes a string as input and reverse only the vowels of a strin...
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java反射reflect
Class类 java中类是谁的对象？ 类是对象，类是java.lang.Class类的实例对象(there is a class named Class) 表达方式 c1 ...
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mysql建立数据库数据表时设定字符集为utf-8
数据库设置 CREATE DATABASE dbname DEFAULT CHARSET utf8 COLLATE utf8_general_ci; 数据表设置 mysql中...
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80. Remove Duplicates from Sorted Array II
题目 Follow up for "Remove Duplicates":What if duplicates are allowed at most twice? For ...
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26. Remove Duplicates from Sorted Array
题目 Given a sorted array, remove the duplicates in place such that each element appear o...
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258. Add Digits
题目 Given a non-negative integer num, repeatedly add all its digits until the result has...
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88. Merge Sorted Array
题目 Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorte...
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1. Two Sum
题目 Given an array of integers, return indices of the two numbers such that they add up ...
