That watcher problem is brutal. I got something similar and also ran out of time. The edge cases on the direction reversals alone ate up like 15 minutes.

How many YOE? Curious if they're filtering at this round heavily for new grads.

Same experience here. The oral problem delivery completely threw me off. By the time I finished writing down the details I had lost 5 minutes already.

Not surprised. HRT basically wants you to produce production-quality C++ in under an hour with no test cases. The bar is just not LC prep.