https://leetcode.com/problems/subsets/description/

All subsets #medium #backtrack

https://leetcode.com/problems/split-a-string-into-the-max-number-of-unique-substrings/description/


Max count of unique split parts #medium #backtrack

https://leetcode.com/problems/construct-smallest-number-from-di-string/description/



Smallest number from 1..9 and Inc-Dec pattern #medium #backtrack #greedy

Triple digit even numbers from digits #easy #backtrack


https://leetcode.com/problems/finding-3-digit-even-numbers/description