Meet Allison & Tim
Your AI coaches
Practice coding interviews out loud with real-time voice coaching. Your code actually runs.
Swim in Rising Water
Swim in Rising Water is really a boundary-finding problem, even if it doesn't look like it at first. It's a hard one for a reason: it stresses boundary precision when the rules pile up. If you can state the invariant for your search space, you'll stop making off-by-one mistakes.
Meet Allison & Tim
Your AI coaches
Practice coding interviews out loud with real-time voice coaching. Your code actually runs.
Desktop required to run this problem
StrongYes runs real code + tests in a desktop editor. Mobile is view-only for now, so you can’t start this here. Sorry about that — email yourself a link and pick it up on your computer.
Desktop required
Sorry — mobile can’t run the editor + tests yet. Email yourself a link to continue on desktop.