Problems from Principles of Algorithmic Problem Solving

	Add	Remove

Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Arithmetic Functions	0.00	67	1447	1317	91%	1.7Easy	en
Bit Game	0.20	224	33	19	58%	8.4Hard	en
Chocolate Division	0.00	38	675	615	91%	1.9Easy	en
Cinema Crowds	0.00	49	1024	934	91%	2.1Easy	en
Cinema Crowds 2	0.00	29	1087	1023	94%	1.8Easy	en
Cinema Seating	0.02	190	386	340	88%	2.8Medium	en
Counting Days	0.00	85	199	175	88%	3.1Medium	en
Cut in Line	0.00	106	1660	1570	95%	1.6Easy	en
Digit Swap	0.00	3	12406	11921	96%	1.2Easy	en
Divisor Counts	0.06	87	193	158	82%	4.1Medium	en
Divisor Shuffle	0.02	75	143	115	80%	4.3Medium	en
Dual Divisibility	0.00	46	195	164	84%	3.7Medium	en
Eulerian Graphs	0.01	256	208	193	93%	2.4Easy	en
Eulerian Graphs 2	0.02	405	142	128	90%	3.1Medium	en
Evening Out 1	0.00	33	408	372	91%	2.2Easy	en
Evening Out 2	0.00	104	197	130	66%	6.3Hard	en
Factorial Power	0.00	242	162	138	85%	3.5Medium	en
Fire Exits	0.01	1183	25	12	48%	8.3Hard	en
Fuzzy Family Tree	0.03	457	61	46	75%	4.2 - 5.4Medium	en
GCD	0.00	13	2255	2130	94%	1.4Easy	en
GCD Sum	0.00	87	79	46	58%	7.5Hard	en
GCD Sum 2	0.09	287	67	44	66%	6.9Hard	en
GCD and LCM	0.00	175	122	93	76%	4.6Medium	en
Generalized Knights	0.00	2180	19	6	32%	8.5Hard	en
Grading	0.00	33	3541	3349	95%	1.4Easy	en
Hailstone Sequences	0.00	48	1170	1101	94%	1.6Easy	en
Hermits	0.01	98	702	590	84%	2.8Medium	en
Inheritance	0.00	82	212	191	90%	2.9Medium	en
Inverse Totient	0.30	938	22	11	50%	7.9Hard	en
Knight Packing	0.00	6	6497	6270	97%	1.3Easy	en
Logic Functions	0.00	96	999	930	93%	1.6Easy	en
Longest Prime Sum	0.00	6	939	830	88%	2.3Easy	en
Longest path in a DAG	0.01	472	218	182	83%	3.9Medium	en
Marathon	0.00	226	51	37	73%	6.5Hard	en
Massive Card Game	0.02	102	1117	987	88%	2.8Medium	en
Maximum Clique	0.00	314	155	100	65%	2.0 - 5.8Hard	en
Minimal Fibonacci Sums	0.00	82	559	500	89%	2.1Easy	en sv
Multiplication Table	0.00	72	398	310	78%	2.5 - 3.0Medium	en
Mårten's DFS	0.03	514	129	85	66%	4.6 - 5.7Hard	en sv
N-sum	0.00	15	11147	10681	96%	1.2Easy	en
Odd A's, Even B's	0.00	64	219	182	83%	4.2Medium	en
Odd Echo	0.00	6	12650	11742	93%	1.2Easy	en
Popularity Contest	0.01	72	848	797	94%	1.8Easy	en
Positive Divisors	0.00	95	384	316	82%	2.8Medium	en
Primality	0.00	34	380	236	62%	2.3 - 5.1Medium	en
Prime Count	0.02	446	258	82	32%	3.0 - 8.1Hard	en
Product Divisors	0.09	373	113	82	73%	6.0Hard	en
Sailing Friends	0.01	191	400	369	92%	2.1Easy	en
Shortest Composite Sum	0.00	28	241	201	83%	3.6Medium	en
Subcommittees	0.00	86	94	71	76%	3.9Medium	en
Triangle Area	0.00	15	12705	12172	96%	1.2Easy	en
Triangle Drama	0.00	105	203	187	92%	2.6Easy	en
Trip Planning	0.03	124	505	422	84%	3.5Medium	en
Two-sum	0.00	6	15290	14600	95%	1.2Easy	en
Varied Amusements	0.00	66	380	313	82%	2.2 - 2.9Medium	en
Vector Functions	0.03	575	650	516	79%	3.2Medium	en