Problems by Per Austrin – Kattis, Kattis

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
#exclude<scoring>	0.01	739	763	42	6%	9.1Hard	en
A Different List Game	0.00	353	1258	266	21%	8.9Hard	en
A List Game	0.00	18	5137	4306	84%	2.9Medium	en
A Real Challenge	0.00	6	10541	9560	91%	1.7Easy	en
AI Jeopardy	0.02	145	187	114	61%	6.5Hard	en
Ace Arbiter	0.00	200	522	379	73%	5.7Hard	en
All Just A Dream	0.02	248	761	581	76%	5.3Medium	en
All Pairs Shortest Path	0.00	389	2969	2175	73%	3.7Medium	en
Apparatus	0.01	288	237	171	72%	5.9Hard	en
Archaeological Recovery	0.02	2862	9	4	44%	6.5Hard	en
Assassins	0.01	232	270	152	56%	6.5Hard	en
Barking Up The Wrong Tree	0.00	2062	123	28	23%	9.2Hard	en
Best Before	0.00	304	481	414	86%	3.7Medium	en
Best Compression Ever	0.00	29	1299	1177	91%	2.5Easy	en
Bilateral Projects	0.00	1487	121	94	78%	6.6Hard	en
Bling	0.09	2601	18	5	28%	8.2Hard	en
Calculator	0.00	27	1401	1145	82%	3.2Medium	en
Cars	0.00	826	81	48	59%	7.6Hard	en
Cat Coat Colors	0.00	1140	358	264	74%	6.0Hard	en
Cat vs. Dog	0.00	351	560	408	73%	4.4Medium	en
Catalan Numbers	0.00	62	1451	1207	83%	3.0Medium	en
Cheating Luck	0.00	615	122	83	68%	7.8Hard	en
Cheering Game	0.00	1080	87	68	78%	6.7Hard	en
Chinese Remainder	0.00	101	1292	1030	80%	3.2Medium	en
Chinese Remainder Theorem (non-relatively prime moduli)	0.00	161	1170	987	84%	3.2Medium	en
Chopping Wood	0.01	252	1037	922	89%	3.3Medium	en
Closest Pair	0.05	572	1261	675	54%	5.8Hard	en
Closest Pair (Uniform)	0.03	312	1152	826	72%	3.5Medium	en
Collapse	0.03	405	377	328	87%	3.3Medium	en
Color Codes	0.01	986	28	15	54%	7.9Hard	en
Convex Hull	0.01	596	3190	2375	74%	3.0Medium	en
DEX Save	0.00	451	81	69	85%	4.0Medium	en
Death and Taxes	0.00	235	663	593	89%	3.1Medium	en
Deceptive Directions	0.03	681	402	278	69%	6.2Hard	en
Disgruntled Judge	0.00	331	207	184	89%	3.5Medium	en
Dominant Strings	0.02	624	341	146	43%	8.5Hard	en
Dungeon Dawdler	0.05	4889	19	9	47%	7.9Hard	en
Dyson Circle	0.01	151	141	113	80%	6.3Hard	en
Easter Eggs	0.17	1366	40	19	48%	8.8Hard	en
Eulerian Path	0.01	617	724	576	80%	4.3Medium	en
Event Planning	0.00	107	1679	1522	91%	2.3Easy	en
Exam Redistribution	0.00	90	1167	1073	92%	2.4Easy	en
Exponial	0.00	352	326	241	74%	5.4Medium	en
Fenwick Tree	0.57	202	2585	2105	81%	3.5Medium	en
Fixing the Bugs	0.05	886	77	45	58%	6.9Hard	en
Fleecing the Raffle	0.00	76	575	499	87%	4.0Medium	en
Flight Plan Evaluation	0.00	1619	79	59	75%	7.6Hard	en
Flight Safety	0.12	2728	19	8	42%	8.0Hard	en
Gaggle	0.08	540	49	35	71%	6.9Hard	en
Get Shorty	0.01	328	3508	2934	84%	2.7Easy	en
Graduation Guarantee	0.04	207	364	314	86%	3.8Medium	en
Hot Hike	0.00	80	3210	2943	92%	1.9Easy	en
House of Cards	0.00	23	849	713	84%	3.5Medium	en
Imperial Measurement	0.00	147	1420	1302	92%	2.6Easy	en
Interception	0.40	3717	31	14	45%	7.7Hard	en
Interval Cover	0.02	343	1058	803	76%	5.0Medium	en
Just A Few More Triangles!	0.02	451	167	128	77%	6.0Hard	en
Kattis' Little Helpers	0.13	3568	24	10	42%	7.1Hard	en
Kitchen Combinatorics	0.00	403	345	289	84%	4.6Medium	en
Knapsack	0.01	233	3836	2926	76%	3.3Medium	en
Ladder	0.00	35	11630	11104	95%	1.5Easy	en
Line Segment Distance	0.00	404	766	653	85%	3.4Medium	en
Line Segment Intersection	0.00	689	751	548	73%	5.7Hard	en
Linear Equation Solver	0.01	892	494	382	77%	5.0Medium	en
Linear Recurrences	0.01	476	316	262	83%	4.7Medium	en
Lines Of Action	0.01	5234	11	2	18%	7.1Hard	en
Longest Increasing Subsequence	0.03	280	2239	1628	73%	3.3Medium	en
Maximum Flow	0.01	402	2010	1524	76%	3.5Medium	en
Maximum Number of Colinear Points	0.03	371	701	600	86%	3.0Medium	en
Meow Factor	0.00	38	1076	909	84%	3.5Medium	en
Meow Factor 2	0.02	172	171	117	68%	5.7Hard	en
Methodic Multiplication	0.00	43	1665	1596	96%	1.6Easy	en
Minimum Cost Maximum Flow	0.01	1377	635	522	82%	4.6Medium	en
Minimum Cut	0.01	730	912	783	86%	3.0Medium	en
Minimum Spanning Tree	0.03	356	2704	2226	82%	2.9Medium	en
Modular Arithmetic	0.00	188	1290	1121	87%	2.6Easy	en
Moving to Nuremberg	0.08	798	126	96	76%	4.8Medium	en
Odometer Analysis	0.00	1111	25	5	20%	9.2Hard	en
Organising the Organisation	0.01	970	44	33	75%	5.5Hard	en
Partial Linear Equation Solver	0.01	1070	284	177	62%	7.0Hard	en
Peer Streaming	0.04	1300	32	20	62%	6.9Hard	en
Pitch Performance	0.00	1205	47	37	79%	5.5Hard	en
Pizza Problems	0.06	933	59	33	56%	6.8Hard	en
Playlist	0.30	1251	104	51	49%	6.1Hard	en
Point in Polygon	0.00	378	994	775	78%	4.6Medium	en
Polygon Area	0.00	118	2501	2211	88%	2.0Easy	en
Polynomial Multiplication 1	0.00	120	1406	1322	94%	1.8Easy	en
Polynomial Multiplication 2	0.04	594	779	550	71%	5.0Medium	en
Power Signs	0.00	519	35	20	57%	7.6Hard	en
Primary Register	0.00	80	1214	1108	91%	2.3Easy	en
Prime Sieve	0.00	236	2694	1988	74%	4.2Medium	en
Proving Equivalences	0.02	740	1132	921	81%	2.8Medium	en
Rational Arithmetic	0.00	64	1598	1360	85%	3.1Medium	en
Riddle of the Sphinx	0.00	127	189	158	84%	3.5Medium	en
SMS Typing	0.19	1722	107	52	49%	8.4Hard	en
Shovelling Snow	0.01	1923	117	50	43%	8.3Hard	en
Shovelling Snow	0.01	1138	77	34	44%	8.8Hard	en
Single source shortest path, negative weights	0.00	238	2212	1760	80%	2.7Easy	en
Single source shortest path, non-negative weights	0.01	251	4805	4025	84%	2.5Easy	en
Single source shortest path, time table	0.01	294	1393	1214	87%	2.6Easy	en

1 2