Echo's Home

103. Binary Tree Zigzag Level Order Traversal

Posted on 2025-02-12 Edited on 2025-04-21 In Leetcode

103. Binary Tree Zigzag Level Order Traversal

Description

Given the root of a binary tree, return the zigzag level order traversal of its nodes’ values. (i.e., from left to right, then right to left for the next level and alternate between).

328. Odd Even Linked List

Posted on 2025-02-09 Edited on 2025-04-21 In Leetcode

328. Odd Even Linked List

Description

Given the head of a singly linked list, group all the nodes with odd indices together followed by the nodes with even indices, and return the reordered list.

1047. Remove All Adjacent Duplicates In String

Posted on 2025-02-03 Edited on 2025-04-21 In Leetcode

1047. Remove All Adjacent Duplicates In String

Description

You are given a string s consisting of lowercase English letters. A duplicate removal consists of choosing two adjacent and equal letters and removing them.

273. Integer to English Words

Posted on 2025-02-03 Edited on 2025-04-21 In Leetcode

273. Integer to English Words

Description

Convert a non-negative integer num to its English words representation.

386. Lexicographical Numbers

Posted on 2025-02-03 Edited on 2025-04-21 In Leetcode

386. Lexicographical Numbers

Description

Given an integer n, return all the numbers in the range [1, n] sorted in lexicographical order.

392. Is Subsequence

Posted on 2025-02-02 Edited on 2025-04-21 In Leetcode

392. Is Subsequence

Description

Given two strings s and t, return true if s is a subsequence of t, or false otherwise.

443. String Compression

Posted on 2025-02-02 Edited on 2025-04-21 In Leetcode

443. String Compression

Description

Given an array of characters chars, compress it using the following algorithm:

179. Largest Number

Posted on 2025-02-02 Edited on 2025-04-21 In Leetcode

179. Largest Number

Description

Given a list of non-negative integers nums, arrange them such that they form the largest number and return it.

249. Group Shifted Strings

Posted on 2025-01-31 Edited on 2025-04-21 In Leetcode

249. Group Shifted Strings

Description

Perform the following shift operations on a string:

163. Missing Ranges

Posted on 2025-01-31 Edited on 2025-04-21 In Leetcode

163. Missing Ranges

Description

You are given an inclusive range [lower, upper] and a sorted unique integer array nums, where all elements are within the inclusive range.

0%