题目英文描述：Given a string, find the length of the longest substring without repeating chara...
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3. 无重复字符的最长子串(C++)
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204. 计数质数
题目英文描述：Count the number of prime numbers less than a non-negative number, n. 题目中文描述：统计所...
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190.颠倒二进制位(C++)
题目英文描述：Reverse bits of a given 32 bits unsigned integer. 题目中文描述：颠倒给定的 32 位无符号整数的二进制位。 代...
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189.旋转数组(C++)
题目英文描述：Given an array, rotate the array to the right by k steps, where k is non-negativ...
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169.多数元素(C++)
题目英文描述:Given an array of size n, find the majority element. The majority element is the...
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168.Excel表列名称(C++)
题目英文描述：Given a positive integer, return its corresponding column title as appear in an ...
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70.爬楼梯(C++)
题目英文描述：You are climbing a stair case. It takes n steps to reach to the top.Each time yo...
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160.相交链表(C++)
题目英文描述：Write a program to find the node at which the intersection of two singly linked ...
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141.环形链表(C++)
题目英文描述:Given a linked list, determine if it has a cycle in it. To represent a cycle in ...
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136.只出现一次的数字(C++)
题目英文描述:Given a non-empty array of integers, every element appears twice except for one....
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122. 买卖股票的最佳时机 II(C++)
题目英文描述：Say you have an array prices for which the ith element is the price of a given s...
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110.平衡二叉树(C++)
题目英文描述：Given a binary tree, determine if it is height-balanced.For this problem, a heig...
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101.对称二叉树(C++)
题目英文描述：Given a binary tree, check whether it is a mirror of itself (ie, symmetric aroun...
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100.相同的树(C++)
题目英文描述:Given two binary trees, write a function to check if they are the same or not. T...
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66.二进制求和(C++)
题目英文描述：Given two binary strings, return their sum (also a binary string). The input str...
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26.删除排序数组中的重复项(C++)
题目英文描述：Given a sorted array nums, remove the duplicates in-place such that each element...
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14. 最长公共前缀(C++)
题目英文描述：Write a function to find the longest common prefix string amongst an array of st...
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++i和i++效率的差异
只有在必要时才使用后置操作符因为前置操作需要做的工作更少，只需要加1后返回加1后的结果即可。而后置操作符则必须先保存操作数原来的值，以便返回未加1之前的值作为操作的结果。对于...
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字典排序
字典排序算法四步法：字典排序：第一步：从右至左找第一个左邻小于右邻的数，记下位置i，值list[a]第二部：从右边往左找第一个右边大于list[a]的第一个值，记下位置j，值...
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minmax_element、min_element、max_element
std::minmax_element（C++11） 函数原型： 返回的是两个迭代器组成的 pair。 使用示例： std::min_element（C++17） 函数原型：...