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Maximum Frequency After Subarray Operation

Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values

Find First and Last Position of Element in Sorted Array

Longest Substring Without Repeating Characters

Using a Robot to Print the Lexicographically Smallest String

Count the Number of Substrings With Dominant Ones

Number of Connected Components in an Undirected Graph

Max Difference You Can Get From Changing an Integer

Maximum Difference Between Increasing Elements

Minimum Equal Sum of Two Arrays After Replacing Zeros

Find All Possible Recipes from Given Supplies

Lexicographically Smallest Equivalent String

Construct Binary Tree from Preorder and Inorder Traversal

Lexicographically Minimum String After Removing Stars

Amazon Interview Guide