Problems from ACM-ICPC World Finals 2019

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Azulejos	3064	626	20%	0.23	607	415	68%	4.6
Beautiful Bridges	689	122	18%	0.23	116	92	79%	5.7
Checks Post Facto	170	42	25%	0.00	35	23	66%	4.6
Circular DNA	921	326	35%	0.03	286	247	86%	3.2
Dead-End Detector	1296	372	29%	0.10	296	255	86%	3.5
Directing Rainfall	522	61	12%	1.12	48	30	62%	6.5
First of Her Name	1457	335	23%	0.16	208	176	85%	4.9
Hobson's Trains	769	222	29%	0.09	172	147	85%	3.9
Karel the Robot	401	110	27%	0.18	49	42	86%	5.5
Miniature Golf	646	114	18%	0.79	123	84	68%	7.3
Traffic Blights	178	40	22%	0.03	39	33	85%	5.9