Given an array of integers nums sorted in ascending order, find the starting and ending...
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34. Find First and Last Position of Element in Sorted Array
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33. Search in Rotated Sorted Array
Suppose an array sorted in ascending order is rotated at some pivot unknown to you befo...
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16. 3Sum Closest
Given an array nums of n integers and an integer target, find three integers in nums su...
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11. Container With Most WaterGiven n non-negative integers a1, a2, ..., an , where each represents a point at coordi...
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53. Maximum Subarray
Given an integer array nums, find the contiguous subarray (containing at least one numb...
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215. Kth Largest Element in an Array
Find the kth largest element in an unsorted array. Note that it is the kth largest elem...
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96. Unique Binary Search Trees
Given n, how many structurally unique BST's (binary search trees) that store values 1 ....
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108. Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height bal...
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107. Binary Tree Level Order Traversal II
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (...
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100. Same Tree
Given two binary trees, write a function to check if they are the same or not. Two bina...
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24. Swap Nodes in PairsGiven a linked list, swap every two adjacent nodes and return its head.You may not modi...
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86. Partition List
Given a linked list and a value x, partition it such that all nodes less than x come be...
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82. Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only ...
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19. Remove Nth Node From End of List
Given a linked list, remove the n-th node from the end of list and return its head. Exa...
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876. Middle of the Linked List
Given a non-empty, singly linked list with head node head, return a middle node of link...
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83. Remove Duplicates from Sorted List
Given a sorted linked list, delete all duplicates such that each element appear only on...
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21. Merge Two Sorted Lists
Merge two sorted linked lists and return it as a new list. The new list should be made ...
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234. Palindrome Linked List
Given a singly linked list, determine if it is a palindrome. Example 1: Input: 1->2Outp...
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206. Reverse Linked List
Reverse a singly linked list. Example: Input: 1->2->3->4->5->NULLOutput: 5->4->3->2->1-...