Find floor of target element in a sorted array

Find the nearest numbers that have same number of 1s for an integer

Implement selection sort on stack

List Combinations - Generate unique combinations from list selecting 1 element from each

Longest Substring with K distinct characters

Maximum Pairwise Product 1 - Given only Positive Integers

Remove duplicates from an unsorted linked list keeping only one instance

Replace all spaces in c-style string with '%20'

Rotate String Problem

Set all bits of a number in a range equal to another number