Problems from ACM-ICPC World Finals 2019

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Azulejos	2597	524	20%	0.23	522	352	67%	4.3
Beautiful Bridges	496	103	21%	0.23	91	75	82%	4.9
Checks Post Facto	83	30	36%	0.00	19	14	74%	4.5
Circular DNA	813	283	35%	0.03	245	211	86%	2.9
Dead-End Detector	643	210	33%	0.10	215	186	87%	3.6
Directing Rainfall	462	49	11%	1.12	37	22	59%	5.2
First of Her Name	1171	262	22%	0.16	174	150	86%	4.5
Hobson's Trains	431	147	34%	0.09	124	110	89%	3.8
Karel the Robot	322	79	25%	0.18	37	29	78%	5.8
Miniature Golf	558	97	17%	0.79	100	69	69%	6.7
Traffic Blights	157	33	21%	0.03	33	27	82%	6.0