1. Given a string of numbers, what are the valid ips we can create from it(without changing its order nor delete numbers.) 2. Icecream truc owner want to give icecream for childreen, each child has rank and when his rank greater then the kid infront/behind him he needs to get more icecream then they does. how many icecream balls does the truc owner will share(minimum)?

leetcode questions and implementation, easy and medium level.