Problems from Waterloo Programming Contest 2001-06-02

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Ones	0.00	60	4646	1394	30%	4.4Medium	en
Sumsets	0.27	502	5081	858	17%	7.1Hard	en
Zipf's Law	0.01	291	2595	615	24%	5.6Hard	en