Problems by Greg Hamerly – Kattis, Kattis

	Add	Remove

Name	Fastest	Shortest	Total	Acc.	Ratio	Difficulty	Languages
Add Two Numbers	0.00	5	40138	21465	53%	1.2Easy	en
Adding Words	0.00	192	26608	6158	23%	4.1Medium	en
All Different Directions	0.00	197	3371	1307	39%	2.8Medium	en
BASIC Interpreter	0.00	422	4201	776	18%	5.2Medium	en
Bag of Tiles	0.02	254	3247	1258	39%	5.6Hard	en
Birthday Paradox	0.00	249	425	131	31%	5.6Hard	en
Bounding Robots	0.00	244	4135	2218	54%	2.1Easy	en
Cellular Merging	0.01	1602	149	18	12%	8.0Hard	en
Charting Progress	0.00	85	4440	1878	42%	2.2Easy	en
Chatter	0.10	611	802	350	44%	4.1Medium	en
Checking For Correctness	0.00	54	3061	891	29%	4.1Medium	en
Connect the Dots	0.00	596	2271	749	33%	3.5Medium	en
Convex Polygon Area	0.00	108	3065	1657	54%	2.0Easy	en
Counting Stars	0.00	255	18126	5126	28%	2.8Medium	en
Dart Scoring	0.00	636	1216	502	41%	3.8Medium	en
Das Blinkenlights	0.00	5	7954	3397	43%	1.7Easy	en
Deduplicating Files	0.01	245	5326	1522	29%	4.2Medium	en
Detailed Differences	0.00	5	24167	11995	50%	1.7Easy	en
Different Distances	0.00	78	7080	3304	47%	2.3Easy	en
Echo Echo Echo	0.00	5	37840	20631	55%	1.2Easy	en
Engineering English	0.00	51	7731	3343	43%	2.5Easy	en
Enlarging Hash Tables	0.00	136	5113	1638	32%	2.8Medium	en
Erdős Numbers	0.01	261	1535	458	30%	4.6Medium	en
Escape Plan	0.01	719	1396	406	29%	5.6Hard	en
Estimating the Area of a Circle	0.00	5	8459	4732	56%	1.6Easy	en
Forest Fires	0.17	773	404	163	40%	3.8Medium	en
Functional Fun	0.00	367	2130	940	44%	2.1Easy	en
Fundamental Neighbors	0.00	116	2292	868	38%	3.1Medium	en
Generalized Recursive Functions	0.02	280	1449	524	36%	4.5Medium	en
Genetic Search	0.00	213	2497	1073	43%	2.9Medium	en
Gerrymandering	0.00	5	3485	2178	62%	1.6Easy	en
Golomb Rulers	0.02	275	1853	884	48%	2.8Medium	en
Hall O' Wee Mirrors	0.00	339	263	103	39%	4.9Medium	en
Heliocentric	0.00	89	5217	2360	45%	2.3Easy	en
Hitting the Targets	0.00	173	3712	2156	58%	1.6Easy	en
How Many Digits?	0.00	71	9323	2547	27%	3.3Medium	en
Hurricane Danger!	0.00	199	1742	550	32%	3.4Medium	en
Image Decoding	0.00	276	6497	1261	19%	3.9Medium	en
Island Hopping	0.01	257	6525	2652	41%	2.4Easy	en
Juggling Patterns	0.00	300	1980	499	25%	5.2Medium	en
Limited Correspondence	0.01	867	1941	305	16%	6.7Hard	en
Loopy Cab Drivers	0.01	958	683	172	25%	6.0Hard	en
Loopy Transit	0.00	345	402	218	54%	3.7Medium	en
Managing Packaging	0.01	400	1152	455	39%	4.7Medium	en
Mandelbrot	0.00	103	4018	1250	31%	2.9Medium	en
Matrix Inverse	0.00	93	4730	1595	34%	3.2Medium	en
Maximizing (And Minimizing) Your Winnings	0.07	363	1059	432	41%	4.0Medium	en
Maximizing Your Pay	0.00	484	867	250	29%	5.3Medium	en
Maze Movement	0.02	962	1975	893	45%	3.2Medium	en
Metaprogramming	0.00	97	4294	1809	42%	2.1Easy	en
Missing Numbers	0.00	5	10731	5523	51%	1.8Easy	en
Multi-Touch Gesture Classification	0.00	2526	242	38	16%	6.7Hard	en
Music Your Way	0.00	151	2876	1430	50%	1.8Easy	en
Musical Notation	0.00	123	1792	870	49%	2.1Easy	en
Name That Permutation	0.00	111	1051	421	40%	4.2Medium	en
Notable Quotables	0.00	1300	184	25	14%	7.8Hard	en
Oddities	0.00	5	49875	25878	52%	1.6Easy	en
Out of Context	0.02	1267	170	32	19%	7.2Hard	en
Pachinko Probability	0.00	540	523	199	38%	5.3Medium	en
Pachyderm Peanut Packing	0.00	265	2226	1054	47%	3.0Medium	en
Page Layout	0.02	310	1785	494	28%	5.7Hard	en
Parallel Analysis	0.08	102	684	271	40%	4.6Medium	en
Parsing Hex	0.00	5	4580	1525	33%	2.6Easy	en
Permutation Encryption	0.00	187	5410	2026	37%	2.3Easy	en
Polish Notation	0.00	122	3356	735	22%	5.8Hard	en
Preludes	0.00	115	3285	1640	50%	2.0Easy	en
Primal Representation	0.02	158	3116	989	32%	3.0Medium	en
Prime Reduction	0.03	160	7083	2198	31%	2.5Easy	en
Prime Spiral	0.00	666	1029	443	43%	3.5Medium	en
Quick Estimates	0.00	5	16402	8778	54%	2.0Easy	en
Quite a Problem	0.00	5	6395	2624	41%	2.1Easy	en
Race Day	0.00	579	741	283	38%	3.7Medium	en
Reachable Roads	0.00	266	7367	3724	51%	1.8Easy	en
Reversing Roads	0.00	904	4480	1150	26%	3.6Medium	en
Robot Protection	0.01	286	2430	1097	45%	2.7Easy	en
Saving Daylight	0.00	76	3842	1972	51%	2.2Easy	en
Secure Doors	0.00	81	9489	4489	47%	1.8Easy	en
Self-Similar Strings	0.02	147	2428	1310	54%	3.1Medium	en
Selling Spatulas	0.00	458	4528	591	13%	6.9Hard	en
Sierpiński Circumference	0.00	60	3357	1213	36%	3.0Medium	en
Sneak Attack	0.00	970	586	64	11%	9.0Hard	en
Sort Two Numbers	0.00	5	33063	15957	48%	1.3Easy	en
Sort of Sorting	0.00	5	28169	12147	43%	1.8Easy	en
Statistics	0.00	69	18096	7687	42%	1.7Easy	en
Stirling's Approximation	0.00	86	1335	539	40%	4.3Medium	en
Structural Differences	0.01	555	112	23	21%	7.5Hard	en
Substring Switcheroo	0.26	576	881	269	31%	5.6Hard	en
Sudokunique	0.01	1424	2292	348	15%	8.3Hard	en
Support Vector Machine	0.02	5	1226	350	29%	3.7Medium	en
Surveillance Squared	0.01	277	348	72	21%	6.9Hard	en
Synchronizing Lists	0.00	108	9209	5429	59%	1.7Easy	en
Texture Analysis	0.00	70	5341	1944	36%	3.9Medium	en
The Rectangles Are Surrounding Us!	0.00	123	1854	864	47%	2.5Easy	en
Transportation Planning	0.03	1157	802	260	32%	4.3Medium	en
Unicycle Counting	0.00	625	307	67	22%	7.6Hard	en
Variable Arithmetic	0.00	249	2110	850	40%	2.4Easy	en
Volume Amplification	0.06	214	1144	308	27%	6.2Hard	en
Where to Live?	0.00	123	949	340	36%	3.8Medium	en
Zipline	0.00	5	3554	1172	33%	3.6Medium	en