Problems by Greg Hamerly – Kattis, Kattis

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Add Two Numbers	0.00	5	38988	20887	54%	1.2Easy	en
Adding Words	0.00	192	26343	6087	23%	4.8Medium	en
All Different Directions	0.00	197	3331	1288	39%	2.7Easy	en
BASIC Interpreter	0.00	422	4142	769	19%	5.3Medium	en
Bag of Tiles	0.02	254	3096	1217	39%	6.1Hard	en
Birthday Paradox	0.00	303	396	125	32%	5.6Hard	en
Bounding Robots	0.00	257	4094	2199	54%	2.0Easy	en
Cellular Merging	0.01	1602	134	17	13%	8.0Hard	en
Charting Progress	0.00	85	4413	1866	42%	2.3Easy	en
Chatter	0.10	611	774	342	44%	4.2Medium	en
Checking For Correctness	0.00	54	3006	874	29%	4.1Medium	en
Connect the Dots	0.00	596	2183	732	34%	3.6Medium	en
Convex Polygon Area	0.00	108	2914	1605	55%	2.0Easy	en
Counting Stars	0.00	255	18074	5101	28%	2.9Medium	en
Dart Scoring	0.00	636	1085	425	39%	4.2Medium	en
Das Blinkenlights	0.00	5	7725	3316	43%	1.7Easy	en
Deduplicating Files	0.01	245	5289	1514	29%	4.3Medium	en
Detailed Differences	0.00	5	23873	11857	50%	1.9Easy	en
Different Distances	0.00	78	6859	3211	47%	2.7Easy	en
Echo Echo Echo	0.00	5	37165	20297	55%	1.2Easy	en
Engineering English	0.00	51	7663	3327	43%	2.6Easy	en
Enlarging Hash Tables	0.00	136	5008	1612	32%	2.8Medium	en
Erdős Numbers	0.01	261	1481	446	30%	4.9Medium	en
Escape Plan	0.01	719	1381	405	29%	5.7Hard	en
Estimating the Area of a Circle	0.00	5	8286	4647	56%	1.6Easy	en
Forest Fires	0.17	773	384	163	42%	3.6Medium	en
Functional Fun	0.00	367	2099	930	44%	2.2Easy	en
Fundamental Neighbors	0.00	116	2205	825	37%	3.1Medium	en
Generalized Recursive Functions	0.02	280	1427	520	36%	4.5Medium	en
Genetic Search	0.00	213	2319	1027	44%	3.0Medium	en
Gerrymandering	0.00	5	3407	2153	63%	1.6Easy	en
Golomb Rulers	0.02	325	1766	846	48%	3.0Medium	en
Hall O' Wee Mirrors	0.00	339	249	103	41%	4.9Medium	en
Heliocentric	0.00	89	5167	2343	45%	2.3Easy	en
Hitting the Targets	0.00	173	3459	2049	59%	1.6Easy	en
How Many Digits?	0.00	71	9296	2545	27%	3.4Medium	en
Hurricane Danger!	0.00	199	1714	544	32%	3.5Medium	en
Image Decoding	0.00	276	6237	1217	20%	4.6Medium	en
Island Hopping	0.01	257	6097	2463	40%	3.6Medium	en
Juggling Patterns	0.00	300	1939	496	26%	5.2Medium	en
Limited Correspondence	0.01	867	1888	303	16%	6.8Hard	en
Loopy Cab Drivers	0.01	958	669	171	26%	6.0Hard	en
Loopy Transit	0.00	345	377	211	56%	3.7Medium	en
Managing Packaging	0.01	400	1132	452	40%	4.8Medium	en
Mandelbrot	0.00	103	3992	1243	31%	3.0Medium	en
Matrix Inverse	0.00	93	4664	1580	34%	3.4Medium	en
Maximizing (And Minimizing) Your Winnings	0.07	363	1025	429	42%	4.0Medium	en
Maximizing Your Pay	0.00	484	824	242	29%	5.3Medium	en
Maze Movement	0.02	962	1947	883	45%	3.3Medium	en
Metaprogramming	0.00	97	4238	1785	42%	2.2Easy	en
Missing Numbers	0.00	5	10518	5447	52%	1.9Easy	en
Multi-Touch Gesture Classification	0.00	2526	229	38	17%	6.7Hard	en
Music Your Way	0.00	151	2709	1338	49%	1.9Easy	en
Musical Notation	0.00	123	1767	867	49%	2.1Easy	en
Name That Permutation	0.00	111	1026	413	40%	4.3Medium	en
Notable Quotables	0.00	1300	170	24	14%	7.9Hard	en
Oddities	0.00	5	48955	25638	52%	1.8Easy	en
Out of Context	0.02	1267	145	31	21%	7.0Hard	en
Pachinko Probability	0.00	540	509	198	39%	5.3Medium	en
Pachyderm Peanut Packing	0.00	265	2172	1043	48%	3.1Medium	en
Page Layout	0.02	310	1719	478	28%	5.8Hard	en
Parallel Analysis	0.08	102	669	270	40%	4.6Medium	en
Parsing Hex	0.00	5	4558	1518	33%	2.6Easy	en
Permutation Encryption	0.00	209	5231	1945	37%	2.2Easy	en
Polish Notation	0.00	122	3295	717	22%	6.1Hard	en
Preludes	0.00	115	3204	1602	50%	2.0Easy	en
Primal Representation	0.02	158	3043	962	32%	4.0Medium	en
Prime Reduction	0.03	160	7034	2180	31%	2.6Easy	en
Prime Spiral	0.00	666	1010	442	44%	3.5Medium	en
Quick Estimates	0.00	5	16098	8622	54%	2.4Easy	en
Quite a Problem	0.00	5	6223	2554	41%	2.2Easy	en
Race Day	0.00	579	724	283	39%	3.7Medium	en
Reachable Roads	0.00	266	7214	3651	51%	1.9Easy	en
Reversing Roads	0.00	904	4282	1070	25%	3.9Medium	en
Robot Protection	0.02	286	2386	1074	45%	2.7Easy	en
Saving Daylight	0.00	76	3820	1963	51%	2.3Easy	en
Secure Doors	0.00	81	9288	4416	48%	1.9Easy	en
Self-Similar Strings	0.02	147	2407	1307	54%	3.3Medium	en
Selling Spatulas	0.00	458	4431	570	13%	7.1Hard	en
Sierpiński Circumference	0.00	60	3325	1206	36%	3.0Medium	en
Sneak Attack	0.00	970	565	64	11%	8.6Hard	en
Sort Two Numbers	0.00	5	32344	15662	48%	1.3Easy	en
Sort of Sorting	0.01	5	27633	11908	43%	1.8Easy	en
Statistics	0.00	69	17692	7543	43%	1.8Easy	en
Stirling's Approximation	0.00	86	1300	530	41%	4.5Medium	en
Structural Differences	0.01	555	95	22	23%	7.1Hard	en
Substring Switcheroo	0.26	576	859	267	31%	5.6Hard	en
Sudokunique	0.01	1810	2129	319	15%	8.5Hard	en
Support Vector Machine	0.02	5	1206	344	29%	3.7Medium	en
Surveillance Squared	0.01	277	329	70	21%	6.8Hard	en
Synchronizing Lists	0.00	108	9095	5351	59%	1.8Easy	en
Texture Analysis	0.00	70	5278	1926	36%	4.1Medium	en
The Rectangles Are Surrounding Us!	0.00	123	1780	838	47%	2.5Easy	en
Transportation Planning	0.05	1157	655	211	32%	4.6Medium	en
Unicycle Counting	0.00	625	293	66	23%	7.7Hard	en
Variable Arithmetic	0.00	249	2085	840	40%	2.4Easy	en
Volume Amplification	0.06	214	1113	302	27%	6.3Hard	en
Where to Live?	0.00	123	929	338	36%	3.8Medium	en
Zipline	0.00	5	3533	1166	33%	3.6Medium	en