Description: There are two properties in the node student id and scores,...

Description: Given an array of integers, find how many pairs in the arra...

【题目描述】 Given a binary tree, return the preorder traversal of its nodes' ...

【题目描述】 There are two sorted arrays A and B of size m and n respectively....

【题目描述】 Follow up for Search in Rotated Sorted Array:What if duplicates a...

【题目描述】 Given a sorted array of n integers, find the starting and ending ...

Description: Given a linked list, reverse the nodes of a linked list k a...

【题目描述】 Given an array S of n integers, find three integers in S such tha...

【题目描述】 Given an array S of n integers, are there elements a, b, c, and d...

【题目描述】 Given an array S of n integers, are there elements a, b, c in S s...