ZSTUOJ

题目编号	标题	来源/分类	解决	提交
2681	Rectilinear polygon	Waterloo Local Contest, 2006.9.30	1	4
2682	Semi-prime H-numbers	Waterloo Local Contest, 2006.9.30	31	58
2683	Life Forms	Waterloo Local Contest, 2006.9.30	8	14
2684	Tautology	Waterloo Local Contest, 2006.9.30	13	19
2685	Rinse	Waterloo Local Contest, 2006.9.30	1	12