Problems from Nordic Collegiate Programming Contest (NCPC) 2021

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Antenna Analysis	1098	321	29%	0.02	358	246	69%	5.9
Breaking Bars	238	26	11%	0.01	40	12	30%	9.5
Customs Controls	618	169	27%	0.01	114	94	82%	5.3
Deceptive Directions	997	231	23%	0.03	259	172	66%	6.8
Eavesdropper Evasion	233	64	27%	0.27	38	17	45%	8.9
Fortune From Folly	209	89	43%	0.00	100	78	78%	5.4
Grazed Grains	859	419	49%	0.00	346	301	87%	3.3
Hiring Help	280	62	22%	0.12	63	39	62%	8.2
Intact Intervals	272	58	21%	0.32	55	40	73%	4.9
Joint Jog Jam	1035	729	70%	0.00	676	641	95%	1.6
Knot Knowledge	2226	1504	68%	0.00	1409	1357	96%	1.4
Locust Locus	1273	655	51%	0.00	631	574	91%	2.0
Marvelous Marathon	34	5	15%	1.00	11	5	45%	8.0