Problems by Greg Hamerly – Kattis, Kattis

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Add Two Numbers	0.00	11	20046	19035	95%	1.3Easy	en
Adding Words	0.00	187	5776	4502	78%	2.8Medium	en
All Different Directions	0.00	197	1233	1060	86%	2.7Easy	en
BASIC Interpreter	0.00	422	600	443	74%	5.2Medium	en
Bag of Tiles	0.02	254	581	453	78%	4.8Medium	en
Birthday Paradox	0.00	249	145	114	79%	5.3Medium	en
Bounding Robots	0.00	244	2176	2017	93%	2.1Easy	en
Cellular Merging	0.01	1602	28	11	39%	8.8Hard	en
Charting Progress	0.00	85	1562	1434	92%	2.2Easy	en
Chatter	0.10	611	268	228	85%	4.0Medium	en
Checking For Correctness	0.00	54	799	666	83%	3.9Medium	en
Connect the Dots	0.00	576	705	613	87%	3.5Medium	en
Convex Polygon Area	0.00	108	1473	1367	93%	2.0Easy	en
Counting Stars	0.00	255	4071	3451	85%	2.6Easy	en
DNA Similarity	0.01	386	17	16	94%	2.8Medium	en
Dart Scoring	0.00	636	418	353	84%	3.6Medium	en
Das Blinkenlights	0.00	45	3271	3056	93%	1.6Easy	en
Deduplicating Files	0.01	245	1451	1119	77%	4.3Medium	en
Detailed Differences	0.00	51	11052	10640	96%	1.4Easy	en
Dicey Frequencies	0.01	340	14	11	79%	4.4Medium	en
Different Distances	0.00	78	3183	2987	94%	2.2Easy	en
Echo Echo Echo	0.00	6	18606	17887	96%	1.2Easy	en
Engineering English	0.00	38	3213	2756	86%	2.5Easy	en
Enlarging Hash Tables	0.00	136	1303	1136	87%	2.6Easy	en
Erdős Numbers	0.00	261	406	319	79%	4.5Medium	en
Escape Plan	0.01	719	353	264	75%	5.5Hard	en
Estimating the Area of a Circle	0.00	49	4473	4243	95%	1.5Easy	en
Five, Six, Pick Up Sticks; Seven, Eight, Lay Them Straight	0.00	179	17	15	88%	3.8Medium	en
Forest Fires	0.17	773	119	95	80%	3.9Medium	en
Fouled files	0.00	32	47	44	94%	2.7Easy	en
Functional Fun	0.00	367	833	777	93%	2.1Easy	en
Fundamental Neighbors	0.00	116	732	626	86%	2.9Medium	en
Generalized Recursive Functions	0.02	280	445	372	84%	4.3Medium	en
Genetic Search	0.00	213	968	870	90%	2.8Medium	en
Gerrymandering	0.00	183	2133	2050	96%	1.6Easy	en
Golomb Rulers	0.01	275	787	700	89%	2.7Easy	en
Hall O' Wee Mirrors	0.00	339	109	83	76%	4.7Medium	en
Heliocentric	0.00	89	2199	2033	92%	2.2Easy	en
Hitting the Targets	0.00	173	2089	1969	94%	1.6Easy	en
How Many Digits?	0.00	71	2288	1812	79%	3.3Medium	en
Hurricane Danger!	0.00	199	501	426	85%	3.3Medium	en
Image Decoding	0.00	261	1175	956	81%	3.0Medium	en
Island Hopping	0.01	257	1900	1693	89%	2.3Easy	en
Juggling Patterns	0.00	262	495	368	74%	4.8Medium	en
Limited Correspondence	0.01	867	191	127	66%	6.5Hard	en
Loopy Cab Drivers	0.01	958	155	124	80%	5.9Hard	en
Loopy Transit	0.00	345	223	186	83%	3.6Medium	en
Managing Packaging	0.01	400	381	282	74%	4.5Medium	en
Mandelbrot	0.00	103	1187	1029	87%	2.7Easy	en
Matrix Inverse	0.00	93	1619	1361	84%	2.9Medium	en
Maximizing (And Minimizing) Your Winnings	0.07	363	350	303	87%	3.9Medium	en
Maximizing Your Pay	0.00	484	212	164	77%	5.1Medium	en
Maze Movement	0.02	962	675	596	88%	3.1Medium	en
Metaprogramming	0.00	97	1709	1518	89%	2.0Easy	en
Missing Numbers	0.00	56	5348	4953	93%	1.8Easy	en
Multi-Touch Gesture Classification	0.00	2526	46	31	67%	6.7Hard	en
Music Your Way	0.00	151	1323	1219	92%	1.8Easy	en
Musical Notation	0.00	123	861	798	93%	2.1Easy	en
Name That Permutation	0.00	111	396	332	84%	4.1Medium	en
Notable Quotables	0.00	1300	41	20	49%	7.2Hard	en
Oddities	0.00	38	24076	23103	96%	1.5Easy	en
Out of Context	0.02	1267	26	14	54%	6.6Hard	en
Pachinko Probability	0.00	540	207	170	82%	5.1Medium	en
Pachyderm Peanut Packing	0.00	265	911	826	91%	2.8Medium	en
Page Layout	0.02	310	356	292	82%	5.6Hard	en
Parallel Analysis	0.08	102	179	150	84%	4.5Medium	en
Parsing Hex	0.00	36	1362	1197	88%	2.5Easy	en
Permutation Encryption	0.00	187	2080	1829	88%	2.1Easy	en
Polish Notation	0.00	122	653	507	78%	5.6Hard	en
Preludes	0.00	115	1625	1512	93%	2.0Easy	en
Primal Representation	0.02	119	779	636	82%	3.0Medium	en
Prime Reduction	0.03	160	1560	1374	88%	2.4Easy	en
Prime Spiral	0.00	666	335	287	86%	3.5Medium	en
Quick Estimates	0.00	18	8507	8064	95%	1.8Easy	en
Quite a Problem	0.00	31	2469	2248	91%	2.1Easy	en
Race Day	0.00	579	233	197	85%	3.7Medium	en
Random Walking in a Winter Wonderland	0.14	1091	10	6	60%	5.2Medium	en
Reachable Roads	0.00	266	2975	2739	92%	1.8Easy	en
RectSect	0.00	175	20	19	95%	3.2Medium	en
Reversing Roads	0.00	904	966	800	83%	3.3Medium	en
Robot Protection	0.01	286	711	644	91%	2.5Easy	en
Saving Daylight	0.00	76	1978	1790	90%	2.2Easy	en
Secure Doors	0.00	81	4394	4061	92%	1.8Easy	en
Self-Similar Strings	0.02	147	398	352	88%	3.0Medium	en
Selling Spatulas	0.00	458	597	375	63%	6.6Hard	en
Sierpiński Circumference	0.00	60	1132	994	88%	3.0Medium	en
Sneak Attack	0.00	970	69	33	48%	8.1Hard	en
Sort Two Numbers	0.00	6	15033	14376	96%	1.2Easy	en
Sort of Sorting	0.00	46	9293	8382	90%	1.8Easy	en
Statistics	0.00	69	7236	6668	92%	1.6Easy	en
Stirling's Approximation	0.00	86	354	293	83%	4.3Medium	en
Structural Differences	0.01	555	35	19	54%	6.9Hard	en
Substring Switcheroo	0.26	576	249	199	80%	5.4Medium	en
Sudokunique	0.01	1424	274	136	50%	8.1Hard	en
Support Vector Machine	0.02	95	353	269	76%	3.5Medium	en
Surveillance Squared	0.01	277	80	51	64%	6.5Hard	en
Synchronizing Lists	0.00	108	4959	4690	95%	1.7Easy	en
Texture Analysis	0.00	70	1819	1528	84%	3.8Medium	en
The Rectangles Are Surrounding Us!	0.00	123	779	672	86%	2.5Easy	en
Transportation Planning	0.03	1157	230	195	85%	4.2Medium	en

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