The PDF version of this problem can be downloaded here. The whole problemset as one file can be downloaded here. Warn: 本題有 specialjudge
9682 9719 18 29 71757646 5746 5958 19 24 1942485264 0 0 0 0 0
15404518 1918408970
Migrated from old NTUJ.
2011 ICPC Phuket