Maximum Difference by Remapping a Digit

Maximum Difference Between Adjacent Elements in a Circular Array

Maximum Difference Between Even and Odd Frequency II

Maximum Difference Between Even and Odd Frequency I

Using a Robot to Print the Lexicographically Smallest String

Analyze Organization Hierarchy

Analyze Subscription Conversion

Apply Substitutions

Assign Elements to Groups with Constraints

Find the Lexicographically Largest String From the Box I