Helen and Oliver are playing games. The loser has to give the winner $$1$$ card each round. Originally, Helen had $$18$$ cards and Oliver had $$22$$ cards. After several rounds, Helen has $$10$$ more cards than Oliver. How many cards does Helen have now? 
Overseas Competition->Knowledge Point->Word Problem Modules->Questions Involving Sum, Difference and Multiples->Problems Involving Sum and Difference