Problems by Greg Hamerly – Kattis, Kattis

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Add Two Numbers	0.00	5	37895	20492	54%	1.2Easy	en
Adding Words	0.00	192	23308	5568	24%	3.9Medium	en
All Different Directions	0.00	197	2645	1218	46%	2.7Easy	en
BASIC Interpreter	0.00	422	3492	726	21%	5.3Medium	en
Bag of Tiles	0.02	254	3035	1203	40%	5.8Hard	en
Birthday Paradox	0.00	303	360	118	33%	5.4Medium	en
Bounding Robots	0.00	257	4008	2153	54%	2.0Easy	en
Cellular Merging	0.01	1602	129	17	13%	8.0Hard	en
Charting Progress	0.00	85	4352	1833	42%	2.2Easy	en
Chatter	0.10	611	756	334	44%	4.1Medium	en
Checking For Correctness	0.00	54	2939	844	29%	4.0Medium	en
Connect the Dots	0.00	596	2115	711	34%	3.5Medium	en
Convex Polygon Area	0.00	108	2815	1548	55%	2.0Easy	en
Counting Stars	0.00	255	17283	4986	29%	2.6Easy	en
Dart Scoring	0.00	790	1044	411	39%	4.1Medium	en
Das Blinkenlights	0.00	5	7507	3223	43%	1.7Easy	en
Deduplicating Files	0.01	245	5074	1450	29%	4.3Medium	en
Detailed Differences	0.00	5	22972	11421	50%	1.5Easy	en
Different Distances	0.00	78	6052	2981	49%	1.7Easy	en
Echo Echo Echo	0.00	5	36522	20057	55%	1.2Easy	en
Engineering English	0.00	51	7509	3223	43%	2.6Easy	en
Enlarging Hash Tables	0.00	136	4845	1568	32%	2.7Easy	en
Erdős Numbers	0.01	261	1424	430	30%	4.8Medium	en
Escape Plan	0.01	1045	1325	396	30%	5.2Medium	en
Estimating the Area of a Circle	0.00	5	8057	4499	56%	1.6Easy	en
Forest Fires	0.17	773	339	154	45%	2.8Medium	en
Functional Fun	0.00	367	2059	904	44%	2.1Easy	en
Fundamental Neighbors	0.00	116	2139	801	37%	3.1Medium	en
Generalized Recursive Functions	0.02	280	1267	443	35%	4.4Medium	en
Genetic Search	0.00	213	1746	912	52%	2.1Easy	en
Gerrymandering	0.00	5	3350	2120	63%	1.6Easy	en
Golomb Rulers	0.02	325	1625	794	49%	2.8Medium	en
Hall O' Wee Mirrors	0.00	649	226	95	42%	4.8Medium	en
Heliocentric	0.00	89	4148	2086	50%	2.0Easy	en
Hitting the Targets	0.00	173	3327	1972	59%	1.5Easy	en
How Many Digits?	0.00	71	8946	2426	27%	3.5Medium	en
Hurricane Danger!	0.00	199	1637	509	31%	3.6Medium	en
Image Decoding	0.00	276	3989	979	25%	3.4Medium	en
Island Hopping	0.01	292	5189	2246	43%	2.5Easy	en
Juggling Patterns	0.00	300	1695	432	25%	5.9Hard	en
Limited Correspondence	0.03	867	1346	285	21%	6.6Hard	en
Loopy Cab Drivers	0.01	958	625	160	26%	6.3Hard	en
Loopy Transit	0.00	345	368	210	57%	3.6Medium	en
Managing Packaging	0.01	400	1097	432	39%	4.6Medium	en
Mandelbrot	0.00	103	3844	1199	31%	2.8Medium	en
Matrix Inverse	0.00	93	4441	1512	34%	3.2Medium	en
Maximizing (And Minimizing) Your Winnings	0.07	363	961	412	43%	4.0Medium	en
Maximizing Your Pay	0.00	484	804	237	29%	5.2Medium	en
Maze Movement	0.02	962	1908	864	45%	3.3Medium	en
Metaprogramming	0.00	97	3988	1686	42%	2.1Easy	en
Missing Numbers	0.00	5	10403	5391	52%	1.9Easy	en
Multi-Touch Gesture Classification	0.00	2526	215	36	17%	6.9Hard	en
Music Your Way	0.00	151	2546	1264	50%	2.2Easy	en
Musical Notation	0.00	123	1711	839	49%	2.1Easy	en
Name That Permutation	0.00	111	964	377	39%	4.2Medium	en
Notable Quotables	0.00	1414	162	23	14%	7.9Hard	en
Oddities	0.00	5	47505	24967	53%	1.3Easy	en
Out of Context	0.03	1267	135	30	22%	7.2Hard	en
Pachinko Probability	0.00	540	492	195	40%	5.2Medium	en
Pachyderm Peanut Packing	0.00	265	1482	856	58%	2.0Easy	en
Page Layout	0.02	310	1670	467	28%	5.3Medium	en
Parallel Analysis	0.08	102	661	267	40%	4.5Medium	en
Parsing Hex	0.00	5	4318	1411	33%	2.6Easy	en
Permutation Encryption	0.00	209	5228	1943	37%	2.2Easy	en
Polish Notation	0.00	122	2372	624	26%	3.6Medium	en
Preludes	0.00	115	3128	1548	49%	2.0Easy	en
Primal Representation	0.02	158	2876	899	31%	4.3Medium	en
Prime Reduction	0.03	160	6713	2083	31%	2.5Easy	en
Prime Spiral	0.00	666	936	424	45%	3.2Medium	en
Quick Estimates	0.00	5	15300	8259	54%	1.6Easy	en
Quite a Problem	0.00	5	5982	2441	41%	2.1Easy	en
Race Day	0.00	782	699	273	39%	3.7Medium	en
Reachable Roads	0.00	266	7104	3591	51%	1.9Easy	en
Reversing Roads	0.00	904	4112	1017	25%	3.5Medium	en
Robot Protection	0.02	286	2288	1020	45%	2.6Easy	en
Saving Daylight	0.00	76	3735	1906	51%	2.2Easy	en
Secure Doors	0.00	81	8512	4191	49%	1.6Easy	en
Self-Similar Strings	0.02	147	2238	1187	53%	3.1Medium	en
Selling Spatulas	0.00	458	4296	558	13%	7.0Hard	en
Sierpiński Circumference	0.00	60	3175	1144	36%	3.0Medium	en
Sneak Attack	0.00	1322	507	60	12%	8.6Hard	en
Sort Two Numbers	0.00	5	31783	15504	49%	1.2Easy	en
Sort of Sorting	0.01	5	27120	11697	43%	1.8Easy	en
Statistics	0.00	69	17391	7401	43%	1.9Easy	en
Stirling's Approximation	0.00	86	1163	486	42%	4.4Medium	en
Structural Differences	0.01	555	88	21	24%	7.2Hard	en
Substring Switcheroo	0.26	576	805	255	32%	5.6Hard	en
Sudokunique	0.01	1810	1786	290	16%	8.6Hard	en
Support Vector Machine	0.02	5	1119	317	28%	3.8Medium	en
Surveillance Squared	0.01	808	290	49	17%	7.3Hard	en
Synchronizing Lists	0.00	108	8778	5193	59%	1.8Easy	en
Texture Analysis	0.00	70	4780	1822	38%	3.0Medium	en
The Rectangles Are Surrounding Us!	0.00	123	1713	819	48%	2.4Easy	en
Transportation Planning	0.05	1157	648	210	32%	4.6Medium	en
Unicycle Counting	0.00	625	282	63	22%	7.3Hard	en
Variable Arithmetic	0.00	249	2002	813	41%	2.3Easy	en
Volume Amplification	0.06	214	1080	292	27%	6.2Hard	en
Where to Live?	0.00	123	894	326	36%	3.8Medium	en
Zipline	0.00	5	3476	1148	33%	3.6Medium	en