The PDF version of this problem can be downloaded here.
3 1 20 1 30 1 40 1 3 1 11 3 12 2 13 1 6 2 10 15 12 17 16 18 18 13 30 10 32 1 6 3 10 15 12 17 16 18 18 13 30 10 32 1
30 8 278 86
Migrated from old NTUJ.
Latin America Regionals 2012