Problems from Waterloo Programming Contest 2001-06-02

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Ones	0.00	60	5018	1529	30%	4.2Medium	en
Sumsets	0.27	391	5321	912	17%	7.2Hard	en
Zipf's Law	0.00	291	2841	671	24%	5.2Medium	en