141. Linked List Cycle

2021-04-09

Problem description:

Given head, the head of a linked list, determine if the linked list has a cycle in it.

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94. Binary Tree Inorder Traversal

2021-04-08

Problem description:

Given the root of a binary tree, return the inorder traversal of its nodes’ values.
Example 1:

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142. Linked List Cycle II

2021-04-06

Problem description:

Given a linked list, return the node where the cycle begins. If there is no cycle, return null.

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92. Reverse Linked List II

2021-04-04

Problem description:

Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of the list from position left to position right, and return the reversed list.

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86. Partition List

2021-04-04

Problem description:

Given the head of a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x.

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82. Remove Duplicates from Sorted List II

2021-04-03

Problem description:

Given the head of a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Return the linked list sorted as well.

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61. Rotate List

2021-04-02

Problem description:

Given the head of a linked list, rotate the list to the right by k places.

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234. Palindrome Linked List

2021-04-01

Problem description:

Given the head of a singly linked list, return true if it is a palindrome.

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235. Lowest Common Ancestor of a Binary Search Tree

2021-03-31

Problem description:

Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.

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70. Climbing Stairs

2021-03-24

Problem description:

You are climbing a staircase. It takes n steps to reach the top.

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