Problems by Greg Hamerly – Kattis, Kattis

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Add Two Numbers	0.00	6	20702	19674	95%	1.2Easy	en
Adding Words	0.00	187	5962	4671	78%	2.9Medium	en
All Different Directions	0.00	197	1252	1077	86%	2.7Easy	en
BASIC Interpreter	0.00	422	603	446	74%	5.1Medium	en
Bag of Tiles	0.02	254	603	469	78%	4.7Medium	en
Birthday Paradox	0.00	249	154	121	79%	5.2Medium	en
Bounding Robots	0.00	244	2187	2027	93%	2.1Easy	en
Cellular Merging	0.01	1602	29	12	41%	8.2Hard	en
Charting Progress	0.00	85	1591	1458	92%	2.2Easy	en
Chatter	0.10	611	289	245	85%	3.9Medium	en
Checking For Correctness	0.00	54	816	682	84%	3.7Medium	en
Connect the Dots	0.00	576	729	636	87%	3.4Medium	en
Convex Polygon Area	0.00	108	1506	1396	93%	1.9Easy	en
Counting Stars	0.00	255	4193	3558	85%	2.6Easy	en
DNA Similarity	0.01	231	46	42	91%	2.5Easy	en
Dart Scoring	0.00	636	470	398	85%	3.3Medium	en
Das Blinkenlights	0.00	45	3333	3115	93%	1.6Easy	en
Deduplicating Files	0.01	245	1514	1172	77%	3.8Medium	en
Detailed Differences	0.00	51	11291	10870	96%	1.4Easy	en
Dicey Frequencies	0.01	336	26	20	77%	4.8Medium	en
Different Distances	0.00	78	3203	3007	94%	2.1Easy	en
Echo Echo Echo	0.00	6	19057	18330	96%	1.2Easy	en
Engineering English	0.00	38	3274	2809	86%	2.5Easy	en
Enlarging Hash Tables	0.00	136	1389	1221	88%	2.4Easy	en
Erdős Numbers	0.00	261	413	324	78%	4.4Medium	en
Escape Plan	0.01	719	371	280	75%	5.2Medium	en
Estimating the Area of a Circle	0.00	49	4541	4303	95%	1.6Easy	en
Five, Six, Pick Up Sticks; Seven, Eight, Lay Them Straight	0.00	179	20	17	85%	4.4Medium	en
Forest Fires	0.17	773	120	96	80%	3.8Medium	en
Fouled files	0.00	32	70	64	91%	3.2Medium	en
Functional Fun	0.00	367	842	784	93%	2.1Easy	en
Fundamental Neighbors	0.00	116	856	743	87%	2.4Easy	en
Generalized Recursive Functions	0.02	280	447	374	84%	4.3Medium	en
Genetic Search	0.00	213	981	878	90%	2.9Medium	en
Gerrymandering	0.00	183	2153	2068	96%	1.6Easy	en
Golomb Rulers	0.01	275	800	712	89%	2.7Easy	en
Hall O' Wee Mirrors	0.00	339	109	84	77%	4.7Medium	en
Heliocentric	0.00	89	2204	2038	92%	2.1Easy	en
Hitting the Targets	0.00	173	2111	1991	94%	1.5Easy	en
How Many Digits?	0.00	71	2313	1833	79%	3.3Medium	en
Hurricane Danger!	0.00	199	617	537	87%	2.9Medium	en
Image Decoding	0.00	253	1227	996	81%	3.1Medium	en
Island Hopping	0.01	173	1960	1745	89%	2.5Easy	en
Juggling Patterns	0.00	234	511	380	74%	4.8Medium	en
Limited Correspondence	0.00	867	195	129	66%	6.5Hard	en
Loopy Cab Drivers	0.01	958	156	125	80%	5.8Hard	en
Loopy Transit	0.00	345	224	187	83%	3.6Medium	en
Managing Packaging	0.01	400	390	291	75%	4.3Medium	en
Mandelbrot	0.00	103	1228	1069	87%	2.5Easy	en
Matrix Inverse	0.00	93	1642	1380	84%	2.8Medium	en
Maximizing (And Minimizing) Your Winnings	0.07	363	351	304	87%	3.8Medium	en
Maximizing Your Pay	0.00	484	219	167	76%	5.1Medium	en
Maze Movement	0.02	962	703	619	88%	2.9Medium	en
Metaprogramming	0.00	97	1741	1547	89%	2.0Easy	en
Missing Numbers	0.00	56	5439	5038	93%	1.8Easy	en
Multi-Touch Gesture Classification	0.00	2526	45	30	67%	6.9Hard	en
Music Your Way	0.00	151	1467	1361	93%	1.8Easy	en
Musical Notation	0.00	123	866	802	93%	2.1Easy	en
Name That Permutation	0.00	111	403	336	83%	4.1Medium	en
Notable Quotables	0.00	1300	42	21	50%	6.9Hard	en
Oddities	0.00	38	24585	23603	96%	1.3Easy	en
Out of Context	0.02	1267	25	13	52%	7.1Hard	en
Pachinko Probability	0.00	540	215	177	82%	4.9Medium	en
Pachyderm Peanut Packing	0.00	265	921	835	91%	2.7Easy	en
Page Layout	0.02	310	389	317	81%	5.5Hard	en
Parallel Analysis	0.08	102	177	148	84%	4.4Medium	en
Parsing Hex	0.00	36	1374	1207	88%	2.4Easy	en
Permutation Encryption	0.00	187	2172	1912	88%	2.2Easy	en
Polish Notation	0.00	122	670	520	78%	4.5Medium	en
Preludes	0.00	115	1675	1553	93%	2.1Easy	en
Primal Representation	0.02	119	794	648	82%	3.0Medium	en
Prime Reduction	0.03	160	1585	1390	88%	2.6Easy	en
Prime Spiral	0.00	666	340	292	86%	3.4Medium	en
Quick Estimates	0.00	18	8595	8146	95%	1.8Easy	en
Quite a Problem	0.00	31	2499	2278	91%	2.0Easy	en
Race Day	0.00	579	232	196	84%	3.6Medium	en
Random Walking in a Winter Wonderland	0.12	842	12	7	58%	5.8Hard	en
Reachable Roads	0.00	266	3128	2877	92%	1.9Easy	en
RectSect	0.00	175	25	22	88%	4.3Medium	en
Reversing Roads	0.00	904	978	812	83%	3.2Medium	en
Robot Protection	0.01	286	732	665	91%	2.4Easy	en
Saving Daylight	0.00	76	1987	1798	90%	2.2Easy	en
Secure Doors	0.00	81	4443	4108	92%	1.7Easy	en
Self-Similar Strings	0.02	147	412	365	89%	2.9Medium	en
Selling Spatulas	0.00	458	611	384	63%	6.4Hard	en
Sierpiński Circumference	0.00	60	1143	1001	88%	3.0Medium	en
Sneak Attack	0.00	970	70	34	49%	8.2Hard	en
Sort Two Numbers	0.00	6	15402	14734	96%	1.2Easy	en
Sort of Sorting	0.00	46	9779	8854	91%	1.6Easy	en
Statistics	0.00	69	7405	6820	92%	1.7Easy	en
Stirling's Approximation	0.00	86	358	297	83%	4.1Medium	en
Structural Differences	0.00	555	37	20	54%	7.2Hard	en
Substring Switcheroo	0.26	576	254	202	80%	5.5Hard	en
Sudokunique	0.01	1424	276	136	49%	8.1Hard	en
Support Vector Machine	0.02	95	356	271	76%	3.5Medium	en
Surveillance Squared	0.01	270	82	53	65%	5.9Hard	en
Synchronizing Lists	0.00	108	5144	4869	95%	1.6Easy	en
Texture Analysis	0.00	70	1822	1531	84%	3.7Medium	en
The Rectangles Are Surrounding Us!	0.00	123	801	690	86%	2.6Easy	en
Transportation Planning	0.03	1157	232	194	84%	4.3Medium	en

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