Common Errors

1. row+1 is actually Down, not Up.


2. Setting the empty label as null character '\0' instead of single space ' ', which is not really an error but causes glitches with ZINC as well as when trying to copy-paste with text editors.


3. Incorrect ordering of subtasks in Task 2, especially recursion order. Technically not an error, as the output is still valid, with deviations only occuring in the case of infinite explosion.