Problems from Waterloo Programming Contest 2001-06-02

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Ones	0.00	60	4967	1500	30%	4.4Medium	en
Sumsets	0.27	466	5190	882	17%	7.2Hard	en
Zipf's Law	0.00	291	2800	656	23%	5.6Hard	en