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125. Valid Palindrome

Posted on 2024-12-28 Edited on 2025-02-12 In Leetcode

Description

A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers.

121. Best Time to Buy and Sell Stock

Posted on 2024-12-28 Edited on 2025-02-12 In Leetcode

121. Best Time to Buy and Sell Stock

Description

You are given an array prices where prices[i] is the price of a given stock on the i^th day.

621. Task Scheduler

Posted on 2024-12-28 Edited on 2025-02-12 In Leetcode

621. Task Scheduler

Description

You are given an array of CPU tasks, each labeled with a letter from A to Z, and a number n. Each CPU interval can be idle or allow the completion of one task. Tasks can be completed in any order, but there’s a constraint: there has to be a gap of at least n intervals between two tasks with the same label.

1046. Last Stone Weight

Posted on 2024-12-28 Edited on 2025-02-12 In Leetcode

1046. Last Stone Weight

Description

You are given an array of integers stones where stones[i] is the weight of the i^th stone.

102. Binary Tree Level Order Traversal

Posted on 2024-12-28 Edited on 2025-02-12 In Leetcode

102. Binary Tree Level Order Traversal

Description

Given the root of a binary tree, return the level order traversal of its nodes’ values. (i.e., from left to right, level by level).

97. Interleaving String

Posted on 2024-12-27 Edited on 2025-02-12 In Leetcode

97. Interleaving String

Description

Given strings s1, s2, and s3, find whether s3 is formed by an interleaving of s1 and s2.

2013. Detect Squares

Posted on 2024-12-27 Edited on 2025-02-12 In Leetcode

2013. Detect Squares

Description

You are given a stream of points on the X-Y plane. Design an algorithm that:

91. Decode Ways

Posted on 2024-12-26 Edited on 2025-02-12 In Leetcode

91. Decode Ways

Description

You have intercepted a secret message encoded as a string of numbers. The message is decoded via the following mapping:

90. Subsets II

Posted on 2024-12-26 Edited on 2025-02-12 In Leetcode

90. Subsets II

Description

Given an integer array nums that may contain duplicates, return all possible subsets (the power set).

84. Largest Rectangle in Histogram

Posted on 2024-12-26 Edited on 2025-02-12 In Leetcode

84. Largest Rectangle in Histogram

Description

Given an array of integers heights representing the histogram’s bar height where the width of each bar is 1, return the area of the largest rectangle in the histogram.