Problems from ACM-ICPC World Finals 2019

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Azulejos	3009	611	20%	0.23	591	402	68%	4.7
Beautiful Bridges	654	120	18%	0.23	109	90	83%	5.2
Checks Post Facto	126	38	30%	0.00	31	20	65%	5.5
Circular DNA	896	317	35%	0.03	279	240	86%	3.2
Dead-End Detector	1258	358	28%	0.10	290	251	87%	3.4
Directing Rainfall	521	60	12%	1.12	47	29	62%	6.8
First of Her Name	1356	310	23%	0.16	201	172	86%	4.7
Hobson's Trains	762	218	29%	0.09	168	144	86%	3.8
Karel the Robot	396	109	28%	0.18	47	41	87%	5.3
Miniature Golf	634	113	18%	0.79	121	83	69%	7.1
Traffic Blights	177	39	22%	0.03	38	32	84%	6.2