Problems from Waterloo Programming Contest 2001-06-02

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Ones	0.00	60	5023	1531	30%	4.3Medium	en
Sumsets	0.27	391	5332	913	17%	7.2Hard	en
Zipf's Law	0.00	291	2858	673	24%	5.2Medium	en