## K Unique String

Given a string s of lowercase alphabet characters, and an integer k, return the minimum number of changes needed in the string (one change involves changing ...

Given a string s of lowercase alphabet characters, and an integer k, return the minimum number of changes needed in the string (one change involves changing ...

Given a list of sorted lists of integers, merge them into one large sorted list.

You are given a list of integers items and an integer n. A salesperson has items in a bag with random IDs. The salesperson can remove as many as n items from...

You are given a list of integers nums. You can reduce the length of nums by taking any two integers, removing them, and appending their sum to the end. The c...

You are given a list of integers nums and an integer n. Given you must remove exactly n numbers, return the least number of unique integers after the removal...

You are given a list of integers cells, representing sizes of different cells. In each iteration, the two largest cells a and b interact according to these r...