Add 2nd birthday chocolate challenge solution
Add 2nd birthday chocolate challenge solution

Kind of O(n) but not really a lot more better than the first solution given the input constraints of m <= 12.

petarov/sandbox,petarov/sandbox,petarov/sandbox,petarov/sandbox,petarov/sandbox,petarov/sandbox,petarov/sandbox,petarov/sandbox,petarov/sandbox