Problems from ACM-ICPC World Finals 2019

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Azulejos	2980	594	20%	0.23	583	395	68%	4.6
Beautiful Bridges	653	119	18%	0.23	108	89	82%	5.1
Checks Post Facto	125	37	30%	0.00	30	19	63%	5.6
Circular DNA	890	312	35%	0.03	274	235	86%	3.2
Dead-End Detector	1238	354	29%	0.10	285	247	87%	3.5
Directing Rainfall	520	59	11%	1.12	46	28	61%	7.0
First of Her Name	1354	308	23%	0.16	199	170	85%	4.7
Hobson's Trains	752	214	28%	0.09	164	141	86%	3.6
Karel the Robot	395	108	27%	0.18	46	40	87%	4.4
Miniature Golf	632	111	18%	0.79	119	81	68%	7.2
Traffic Blights	168	37	22%	0.03	36	30	83%	6.3