Some guys from my university solve 800-rated problems daily just to show they are regular coders. Surprisingly, during contests, they now manage to solve Div. 2 A, B, C, and sometimes even D problems, which is unexpected. Not long ago, they couldn’t even solve A. Seeing such a sudden improvement in contests makes you wonder whether it’s purely practice or something else behind the scenes.

Whether it gets downvotes or not, I want them to feel ashamed.