摘要： Remove Linked List ElementsRemove all elements from a linked list of integers that have valueval.ExampleGiven:1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6,va... 阅读全文

摘要： Happy NumberWrite an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any posi... 阅读全文

摘要： Isomorphic StringsGiven two stringssandt, determine if they are isomorphic.Two strings are isomorphic if the characters inscan be replaced to gett.All... 阅读全文

摘要： Bitwise AND of Numbers RangeGiven a range [m, n] where 0 = (int)pow(2.0, i)) && (ind+gap <= (int)pow(2.0, i+1)-1)) //all 1's ... 阅读全文

摘要： Repeated DNA SequencesAll DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it i... 阅读全文

摘要： Number of IslandsGiven a 2d grid map of'1's (land) and'0's (water), count the number of islands. An island is surrounded by water and is formed by con... 阅读全文

摘要： Binary Tree Right Side ViewGiven a binary tree, imagine yourself standing on therightside of it, return the values of the nodes you can see ordered fr... 阅读全文

摘要： House RobberYou are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint... 阅读全文

摘要： 最好在定义的时候就给出初始值。类和结构体给出构造函数。比如int，在vs的debug和release模式下，初始化的值是不同的。 阅读全文

摘要： stoi函数默认要求输入的参数字符串是符合int范围的[-2147483648, 2147483647]，否则会runtime error。atoi函数则不做范围检查，若超过int范围，则显示-2147483648（溢出下界）或者2147483647（溢出上界）。 阅读全文