Given a grid where each entry is only 0 or 1, find the number of corner rectangles. A corner rectangle is 4 distinct 1s on the grid that form an axis-aligned rectangle. Note that only the corners need ...

Imagine we’re writing a mechanical formatter for Java, like google-java-format. We’d like the formatted output to follow a few strict rules (e.g., no lines longer than some limit, with specified ...

I'm making a game with some friends, and we have a little progress bar thing that's essentially just a filled, colored rectangle. What we want to do is make it translucent so that you can see the ...

I'm learning Java by writing a Mandelbrot program. I can draw the image, then use the mouse to choose an area to magnify. Works great, except... When I choose the area to magnify (mouse down, move ...