Putnam 1984 B3
An interesting Binary Operation
In this article, I'm going to present the solution to an interesting problem that came from the 1984 Putnam contest. This is a B3 problem, so not relatively easy, but also not crazy lengthy or challenging.
The proof below is my original thought process and my work
If you did wonder, I wrote the solution below on the word doc while solving it at the same time. My reason was that I didn't have paper due to packing my stuff for moving out. Nevertheless, it worked out!
I hope you enjoyed reading my proof!!!