Hello, Codeforces! Today MikeMirzayanov taught me how to add contests to the gym so we started adding old Google Code Jam rounds (2015 Google Code Jam Round 1A (GCJ 15 Round 1A), 2015 Google Code Jam Round 1C (GCJ 15 Round 1C)). Google archives don't contain solutions so we found someone who stores the solutions.

I wonder if some of you can help us find other sources of correct solutions so we can be absolutely sure that everything is correct.