Problems by Ragnar Groot Koerkamp

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Daily Division	138	45	33%	0.06	40	32	80%	3.8
Detour	539	156	29%	0.04	157	127	81%	4.1
Disastrous Doubling	916	233	25%	0.01	237	198	84%	4.1
Harry the Hamster	34	14	41%	0.11	18	14	78%	7.5
Isomorphic Inversion	374	93	25%	0.01	87	61	70%	6.0
Janitor Troubles	830	540	65%	0.00	539	512	95%	1.6
Journal Editing	100	23	23%	0.14	21	17	81%	6.2
Jumping Choreography	49	19	39%	0.90	14	11	79%	5.9
Jurassic Jigsaw	193	81	42%	0.01	57	52	91%	3.2
KALLAX Construction	107	21	20%	0.00	27	20	74%	5.7