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	21097	20058	95%	1.2Easy	en
Adding Words	0.00	187	6083	4781	79%	2.6Easy	en
All Different Directions	0.00	197	1288	1110	86%	2.5Easy	en
BASIC Interpreter	0.00	422	613	456	74%	4.9Medium	en
Bag of Tiles	0.02	254	624	488	78%	4.4Medium	en
Birthday Paradox	0.00	249	154	122	79%	5.1Medium	en
Bounding Robots	0.00	244	2203	2043	93%	2.0Easy	en
Cellular Merging	0.01	1602	30	12	40%	8.8Hard	en
Charting Progress	0.00	85	1631	1497	92%	2.1Easy	en
Chatter	0.10	611	306	262	86%	3.8Medium	en
Checking For Correctness	0.00	54	825	691	84%	3.6Medium	en
Connect the Dots	0.00	576	769	675	88%	3.3Medium	en
Convex Polygon Area	0.00	108	1519	1409	93%	1.9Easy	en
Counting Stars	0.00	255	4218	3581	85%	2.5Easy	en
DNA Similarity	0.00	231	52	47	90%	2.5Easy	en
Dart Scoring	0.00	636	488	411	84%	3.3Medium	en
Das Blinkenlights	0.00	45	3349	3130	93%	1.6Easy	en
Deduplicating Files	0.01	245	1543	1199	78%	3.5Medium	en
Detailed Differences	0.00	51	11476	11054	96%	1.3Easy	en
Dicey Frequencies	0.00	336	28	22	79%	4.3Medium	en
Different Distances	0.00	78	3221	3025	94%	1.9Easy	en
Echo Echo Echo	0.00	6	19371	18635	96%	1.2Easy	en
Engineering English	0.00	38	3291	2826	86%	2.4Easy	en
Enlarging Hash Tables	0.00	136	1401	1232	88%	2.4Easy	en
Erdős Numbers	0.00	261	414	325	79%	4.3Medium	en
Escape Plan	0.01	719	375	284	76%	5.0Medium	en
Estimating the Area of a Circle	0.00	49	4554	4314	95%	1.6Easy	en
Five, Six, Pick Up Sticks; Seven, Eight, Lay Them Straight	0.00	179	21	18	86%	4.6Medium	en
Forest Fires	0.17	773	121	97	80%	3.9Medium	en
Fouled files	0.00	32	76	68	89%	4.0Medium	en
Functional Fun	0.00	367	846	788	93%	2.0Easy	en
Fundamental Neighbors	0.00	116	864	750	87%	2.4Easy	en
Generalized Recursive Functions	0.02	280	460	388	84%	4.1Medium	en
Genetic Search	0.00	213	993	888	89%	2.8Medium	en
Gerrymandering	0.00	183	2159	2074	96%	1.6Easy	en
Golomb Rulers	0.01	275	807	718	89%	2.6Easy	en
Hall O' Wee Mirrors	0.00	339	109	84	77%	4.8Medium	en
Heliocentric	0.00	89	2228	2055	92%	2.2Easy	en
Hitting the Targets	0.00	173	2127	2007	94%	1.5Easy	en
How Many Digits?	0.00	71	2328	1847	79%	3.2Medium	en
Hurricane Danger!	0.00	199	619	539	87%	2.8Medium	en
Image Decoding	0.00	253	1262	1029	82%	2.8Medium	en
Island Hopping	0.01	173	1996	1779	89%	2.3Easy	en
Juggling Patterns	0.00	234	529	396	75%	4.6Medium	en
Limited Correspondence	0.00	867	198	132	67%	6.4Hard	en
Loopy Cab Drivers	0.01	958	157	126	80%	5.9Hard	en
Loopy Transit	0.00	345	227	191	84%	3.4Medium	en
Managing Packaging	0.01	400	390	291	75%	4.2Medium	en
Mandelbrot	0.00	103	1236	1076	87%	2.5Easy	en
Matrix Inverse	0.00	93	1652	1388	84%	2.7Easy	en
Maximizing (And Minimizing) Your Winnings	0.02	363	354	308	87%	3.6Medium	en
Maximizing Your Pay	0.00	484	225	171	76%	5.0Medium	en
Maze Movement	0.02	962	726	641	88%	2.9Medium	en
Metaprogramming	0.00	97	1768	1572	89%	2.0Easy	en
Missing Numbers	0.00	56	5503	5097	93%	1.8Easy	en
Multi-Touch Gesture Classification	0.00	2526	45	31	69%	6.1Hard	en
Music Your Way	0.00	151	1494	1388	93%	1.7Easy	en
Musical Notation	0.00	123	871	806	93%	2.1Easy	en
Name That Permutation	0.00	111	409	342	84%	4.1Medium	en
Notable Quotables	0.00	1300	42	21	50%	7.1Hard	en
Oddities	0.00	38	24858	23856	96%	1.4Easy	en
Out of Context	0.02	1267	25	13	52%	7.3Hard	en
Pachinko Probability	0.00	540	216	178	82%	4.8Medium	en
Pachyderm Peanut Packing	0.00	265	960	873	91%	2.5Easy	en
Page Layout	0.02	310	398	326	82%	5.3Medium	en
Parallel Analysis	0.08	102	182	152	84%	4.5Medium	en
Parsing Hex	0.00	36	1414	1246	88%	2.3Easy	en
Permutation Encryption	0.00	187	2187	1927	88%	2.2Easy	en
Polish Notation	0.00	122	671	521	78%	4.1Medium	en
Preludes	0.00	115	1687	1566	93%	2.0Easy	en
Primal Representation	0.02	119	801	655	82%	2.9Medium	en
Prime Reduction	0.03	160	1588	1393	88%	2.6Easy	en
Prime Spiral	0.00	666	342	293	86%	3.3Medium	en
Quick Estimates	0.00	18	8623	8171	95%	1.7Easy	en
Quite a Problem	0.00	31	2509	2288	91%	2.0Easy	en
Race Day	0.00	579	234	197	84%	3.5Medium	en
Random Walking in a Winter Wonderland	0.03	842	16	9	56%	6.6Hard	en
Reachable Roads	0.00	266	3177	2921	92%	1.9Easy	en
RectSect	0.00	175	29	26	90%	3.3Medium	en
Reversing Roads	0.00	904	991	824	83%	3.1Medium	en
Robot Protection	0.01	286	750	682	91%	2.3Easy	en
Saving Daylight	0.00	76	2015	1820	90%	2.2Easy	en
Secure Doors	0.00	81	4495	4160	93%	1.6Easy	en
Self-Similar Strings	0.02	147	413	366	89%	2.8Medium	en
Selling Spatulas	0.00	458	620	391	63%	6.4Hard	en
Sierpiński Circumference	0.00	60	1147	1006	88%	3.0Medium	en
Sneak Attack	0.00	970	70	34	49%	8.2Hard	en
Sort Two Numbers	0.00	6	15604	14932	96%	1.2Easy	en
Sort of Sorting	0.00	46	10031	9089	91%	1.6Easy	en
Statistics	0.00	69	7471	6881	92%	1.7Easy	en
Stirling's Approximation	0.00	86	359	299	83%	4.0Medium	en
Structural Differences	0.00	555	37	21	57%	6.4Hard	en
Substring Switcheroo	0.26	576	254	202	80%	5.4Medium	en
Sudokunique	0.01	1424	276	136	49%	8.1Hard	en
Support Vector Machine	0.02	95	359	274	76%	3.3Medium	en
Surveillance Squared	0.01	270	82	54	66%	5.5Hard	en
Synchronizing Lists	0.00	108	5169	4893	95%	1.6Easy	en
Texture Analysis	0.00	70	1826	1534	84%	3.5Medium	en
The Rectangles Are Surrounding Us!	0.00	123	838	726	87%	2.5Easy	en
Transportation Planning	0.03	1157	235	197	84%	4.1Medium	en

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