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Single Number Total Accepted: 18499 Total Submissions: 41204My SubmissionsGiven an array of integers, every element appears twice except for one. Find that single one.Note:Your algor

LRU Cache Total Accepted: 16727 Total Submissions: 120052My SubmissionsDesign and implement a data structure for Least Recently Used (LRU) cache. It should support the following operatio

Max Points on a Line Total Accepted: 17476 Total Submissions: 159844My SubmissionsGiven n points on a 2D plane, find the maximum number of points that lie on the same straight line.

Palindrome Partitioning Total Accepted: 18645 Total Submissions: 71813My SubmissionsGiven a string s, partition s such that every substring of the partition is a palindrome.Return all

class Solution {public: int evalRPN(vector &tokens) { int i = 0; while (i < tokens.size()) { if (isOperator(tokens[i])) { i -= 2; strin

Search in Rotated Sorted Array Total Accepted: 9935 Total Submissions: 35479Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might becom

N-Queens Total Accepted: 5516 Total Submissions: 21906My SubmissionsThe n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other.

Maximum Depth of Binary Tree Total Accepted: 11728 Total Submissions: 26761My SubmissionsGiven a binary tree, find its maximum depth.The maximum depth is the number of nodes along the

Sqrt(x) Total Accepted: 8672 Total Submissions: 40362My SubmissionsImplement int sqrt(int x).Compute and return the square root of x.二分时，while (l int做乘法时会溢出,虽然答案还是int。

Valid Number Total Accepted: 4830 Total Submissions: 45426My SubmissionsValidate if a given string is numeric.Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => fal

Copy List with Random Pointer Total Accepted: 8155 Total Submissions: 37086My SubmissionsA linked list is given such that each node contains an additional random pointer which could poin

N-Queens II Total Accepted: 4907 Total Submissions: 16210My SubmissionsFollow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct

Remove Element Total Accepted: 9749 Total Submissions: 30209My SubmissionsGiven an array and a value, remove all instances of that value in place and return the new length.The order

Remove Duplicates from Sorted List Total Accepted: 10312 Total Submissions: 30340My SubmissionsGiven a sorted linked list, delete all duplicates such that each element appear only once.

Candy Total Accepted: 6750 Total Submissions: 39626My SubmissionsThere are N children standing in a line. Each child is assigned a rating value.You are giving candies to these children

/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */class Solution {public: ListNode *ro

Word Break II Total Accepted: 7703 Total Submissions: 50334My SubmissionsGiven a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a val