The PDF version of this problemset can be downloaded here.
2 1 2 3 1 2 4 5 1 2 3 2 3 4 3 4 5 4 5 6 1 3 7 3 5 2 5 2 8 2 4 3 3 1 2 3 2 3 5 1 2 7 1 2 8
3 12 impossible
NTUJ cannot show multiple samples, so we merged them here
Migrated from old NTUJ.