Last school holiday, my cousin came over to stay at my home. We made the most of his stay at my place... and I even earned a few chocolates.

Everyday, we would play a game of chess. Whoever lost the game owed a chocolate to the other. After the last game we played (that was the day he was to leave), we counted the number of games each of us had won and lost. Wow! I had won more than him. So, he handed me 22 chocolates... though he himself was the winner in 5 games.

How many days did my cousin spend at my place?