How to solve tasks

Short answer (quiz tasks)

These tasks only require you to input a single line of text as an answer.

They can score only 0 (if wrong) or full score (100, if right).

Code tasks

These tasks require you to write a program, that will do the given task exactly as written in the problem statement. Your solution will be tested against a number test inputs. Some of them are visible to you, while others -- not. Your score usually depends on how many tests you've passed.

With the score, you'll receive verdicts small feedback about your solution. If everything's ok, you'll receive OK. If your solution gave a wrong answer, you'll get WA. If it has crashed while running, you'll get RE (runtime error).

Additionally, these tasks introduce constraints: memory (RAM) limit and time limit. If your solution exceeds these while running, it'll be stopped and you'll receive ML (memory limit) or TL (time limit) verdict.

Also, the contest creators might set up precompile checks. E.g. forbid you to import some modules. If your solution fails to comply, you'll receive PCF (precompile check failed).