Problems from Principles of Algorithmic Problem Solving

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Arithmetic Functions	0.00	67	1503	1361	91%	1.8Easy	en
Bit Game	0.20	224	41	25	61%	7.7Hard	en
Chocolate Division	0.00	38	733	672	92%	1.8Easy	en
Cinema Crowds	0.00	49	1080	985	91%	2.1Easy	en
Cinema Crowds 2	0.00	29	1154	1089	94%	1.7Easy	en
Cinema Seating	0.02	190	412	363	88%	2.4Easy	en
Counting Days	0.00	85	210	180	86%	3.1Medium	en
Cut in Line	0.00	106	1992	1888	95%	1.6Easy	en
Digit Swap	0.00	3	12858	12358	96%	1.2Easy	en
Divisor Counts	0.06	87	296	253	85%	3.1Medium	en
Divisor Shuffle	0.02	75	172	134	78%	3.4Medium	en
Dual Divisibility	0.00	46	232	199	86%	3.3Medium	en
Eulerian Graphs	0.01	256	227	209	92%	2.4Easy	en
Eulerian Graphs 2	0.02	269	155	140	90%	2.3Easy	en
Evening Out 1	0.00	33	428	390	91%	2.2Easy	en
Evening Out 2	0.00	104	273	206	75%	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	60	46	77%	3.6 - 4.5Medium	en
GCD	0.00	13	2457	2321	94%	1.4Easy	en
GCD Sum	0.00	79	101	68	67%	5.5Hard	en
GCD Sum 2	0.56	287	84	58	69%	4.7Medium	en
GCD and LCM	0.00	175	130	102	78%	3.9Medium	en
Generalized Knights	0.00	2180	18	6	33%	8.5Hard	en
Grading	0.00	33	3734	3534	95%	1.3Easy	en
Hailstone Sequences	0.00	48	1234	1164	94%	1.6Easy	en
Hermits	0.01	98	777	663	85%	2.5Easy	en
Inheritance	0.00	82	248	226	91%	2.5Easy	en
Inverse Totient	0.08	938	32	19	59%	7.7Hard	en
Knight Packing	0.00	6	6689	6459	97%	1.3Easy	en
Logic Functions	0.00	96	1047	973	93%	1.6Easy	en
Longest Prime Sum	0.00	6	1014	901	89%	2.2Easy	en
Longest path in a DAG	0.01	472	241	204	85%	3.6Medium	en
Marathon	0.00	226	64	47	73%	7.3Hard	en
Massive Card Game	0.02	102	1276	1138	89%	2.2Easy	en
Maximum Clique	0.00	314	171	112	65%	1.9 - 5.3Medium	en
Minimal Fibonacci Sums	0.00	82	618	557	90%	2.0Easy	en sv
Multiplication Table	0.00	72	568	467	82%	2.1 - 2.4Easy	en
Mårten's DFS	0.03	514	200	149	74%	3.2 - 3.5Medium	en sv
N-sum	0.00	15	11771	11284	96%	1.2Easy	en
Odd A's, Even B's	0.00	64	244	205	84%	3.4Medium	en
Odd Echo	0.00	6	13694	12766	93%	1.2Easy	en
Popularity Contest	0.01	72	913	858	94%	1.8Easy	en
Positive Divisors	0.00	95	500	419	84%	2.6Easy	en
Primality	0.00	34	403	252	63%	2.2 - 4.9Medium	en
Prime Count	0.02	389	264	87	33%	2.9 - 8.0Hard	en
Product Divisors	0.09	373	118	85	72%	6.1Hard	en
Sailing Friends	0.01	191	423	389	92%	2.1Easy	en
Shortest Composite Sum	0.00	28	258	215	83%	3.6Medium	en
Subcommittees	0.00	6	130	107	82%	2.9Medium	en
Triangle Area	0.00	15	13238	12694	96%	1.2Easy	en
Triangle Drama	0.00	105	210	195	93%	2.5Easy	en
Trip Planning	0.02	124	577	491	85%	2.8Medium	en
Two-sum	0.00	6	15907	15199	96%	1.2Easy	en
Varied Amusements	0.00	66	400	328	82%	2.0 - 2.6Easy	en
Vector Functions	0.03	575	686	550	80%	3.0Medium	en