Problems from ACM-ICPC World Finals 2019

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Azulejos	3080	708	23%	0.23	559	438	78%	4.7
Beautiful Bridges	671	142	21%	0.23	142	110	77%	5.7
Checks Post Facto	120	40	33%	0.00	29	22	76%	4.5
Circular DNA	1178	409	35%	0.03	337	296	88%	3.2
Dead-End Detector	1389	408	29%	0.10	319	281	88%	3.5
Directing Rainfall	552	79	14%	1.10	57	39	68%	6.2
First of Her Name	1688	384	23%	0.16	253	201	79%	5.0
Hobson's Trains	771	258	33%	0.09	199	173	87%	3.9
Karel the Robot	344	110	32%	0.11	65	49	75%	5.4
Miniature Golf	725	136	19%	0.79	160	103	64%	7.3
Traffic Blights	240	58	24%	0.03	66	49	74%	5.5