Problems from Principles of Algorithmic Problem Solving

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Arithmetic Functions	0.00	67	1505	1363	91%	1.8Easy	en
Bit Game	0.20	224	41	25	61%	7.8Hard	en
Chocolate Division	0.00	38	735	673	92%	1.8Easy	en
Cinema Crowds	0.00	49	1090	995	91%	2.0Easy	en
Cinema Crowds 2	0.00	29	1161	1096	94%	1.7Easy	en
Cinema Seating	0.02	190	414	365	88%	2.3Easy	en
Counting Days	0.00	85	211	181	86%	3.1Medium	en
Cut in Line	0.00	106	2001	1897	95%	1.6Easy	en
Digit Swap	0.00	3	12892	12391	96%	1.2Easy	en
Divisor Counts	0.06	87	329	287	87%	2.8Medium	en
Divisor Shuffle	0.02	75	173	135	78%	3.4Medium	en
Dual Divisibility	0.00	46	233	200	86%	3.3Medium	en
Eulerian Graphs	0.01	256	249	229	92%	2.4Easy	en
Eulerian Graphs 2	0.02	269	176	159	90%	2.3Easy	en
Evening Out 1	0.00	33	431	393	91%	2.2Easy	en
Evening Out 2	0.00	104	275	208	76%	5.1Medium	en
Factorial Power	0.00	242	193	165	85%	3.4Medium	en
Fire Exits	0.01	839	27	13	48%	8.5Hard	en
Fuzzy Family Tree	0.03	457	61	47	77%	3.5 - 4.5Medium	en
GCD	0.00	13	2466	2330	94%	1.4Easy	en
GCD Sum	0.00	79	112	75	67%	6.3Hard	en
GCD Sum 2	0.07	287	86	59	69%	5.1Medium	en
GCD and LCM	0.00	175	131	103	79%	3.9Medium	en
Generalized Knights	0.00	2180	19	7	37%	8.4Hard	en
Grading	0.00	33	3755	3555	95%	1.4Easy	en
Hailstone Sequences	0.00	48	1236	1166	94%	1.6Easy	en
Hermits	0.01	98	783	669	85%	2.5Easy	en
Inheritance	0.00	82	249	227	91%	2.5Easy	en
Inverse Totient	0.08	938	33	20	61%	7.2Hard	en
Knight Packing	0.00	6	6733	6503	97%	1.3Easy	en
Logic Functions	0.00	96	1050	975	93%	1.6Easy	en
Longest Prime Sum	0.00	6	1019	906	89%	2.2Easy	en
Longest path in a DAG	0.01	458	244	207	85%	3.6Medium	en
Marathon	0.00	226	65	48	74%	7.2Hard	en
Massive Card Game	0.02	102	1308	1169	89%	2.3Easy	en
Maximum Clique	0.00	314	176	114	65%	1.9 - 5.5Medium	en
Minimal Fibonacci Sums	0.00	82	620	559	90%	2.0Easy	en sv
Multiplication Table	0.00	72	569	469	82%	2.1 - 2.4Easy	en
Mårten's DFS	0.03	514	201	149	74%	3.2 - 3.5Medium	en sv
N-sum	0.00	15	11843	11354	96%	1.2Easy	en
Odd A's, Even B's	0.00	64	245	206	84%	3.3Medium	en
Odd Echo	0.00	6	13743	12813	93%	1.2Easy	en
Popularity Contest	0.01	72	917	863	94%	1.7Easy	en
Positive Divisors	0.00	95	503	422	84%	2.6Easy	en
Primality	0.00	34	405	254	63%	2.2 - 4.9Medium	en
Prime Count	0.02	389	266	88	33%	2.9 - 7.9Hard	en
Product Divisors	0.09	373	120	87	72%	6.0Hard	en
Sailing Friends	0.01	191	431	397	92%	2.1Easy	en
Shortest Composite Sum	0.00	28	265	222	84%	3.6Medium	en
Subcommittees	0.00	6	134	110	82%	2.9Medium	en
Triangle Area	0.00	15	13269	12725	96%	1.2Easy	en
Triangle Drama	0.00	105	211	196	93%	2.5Easy	en
Trip Planning	0.02	124	643	556	86%	2.5Easy	en
Two-sum	0.00	6	15957	15249	96%	1.2Easy	en
Varied Amusements	0.00	66	402	330	82%	2.0 - 2.6Easy	en
Vector Functions	0.03	575	687	551	80%	3.0Medium	en