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	1455	1325	91%	1.7Easy	en
Bit Game	0.20	224	33	20	61%	8.1Hard	en
Chocolate Division	0.00	38	679	618	91%	1.9Easy	en
Cinema Crowds	0.00	49	1026	937	91%	2.1Easy	en
Cinema Crowds 2	0.00	29	1087	1023	94%	1.8Easy	en
Cinema Seating	0.02	190	396	348	88%	2.7Easy	en
Counting Days	0.00	85	200	176	88%	3.0Medium	en
Cut in Line	0.00	106	1666	1576	95%	1.6Easy	en
Digit Swap	0.00	3	12478	11993	96%	1.2Easy	en
Divisor Counts	0.06	87	219	180	82%	3.8Medium	en
Divisor Shuffle	0.02	75	150	121	81%	3.4Medium	en
Dual Divisibility	0.00	46	198	166	84%	3.7Medium	en
Eulerian Graphs	0.01	256	212	195	92%	2.4Easy	en
Eulerian Graphs 2	0.02	405	146	131	90%	2.5Easy	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	165	140	85%	3.6Medium	en
Fire Exits	0.01	1183	24	12	50%	8.3Hard	en
Fuzzy Family Tree	0.03	457	60	45	75%	4.2 - 5.3Medium	en
GCD	0.00	13	2289	2164	95%	1.4Easy	en
GCD Sum	0.00	87	79	46	58%	7.3Hard	en
GCD Sum 2	0.59	287	78	52	67%	5.6Hard	en
GCD and LCM	0.00	175	123	94	76%	4.6Medium	en
Generalized Knights	0.00	2180	18	6	33%	8.4Hard	en
Grading	0.00	33	3564	3370	95%	1.4Easy	en
Hailstone Sequences	0.00	48	1172	1103	94%	1.6Easy	en
Hermits	0.01	98	705	592	84%	2.8Medium	en
Inheritance	0.00	82	223	202	91%	2.8Medium	en
Inverse Totient	0.30	938	21	11	52%	7.9Hard	en
Knight Packing	0.00	6	6543	6316	97%	1.3Easy	en
Logic Functions	0.00	96	1006	937	93%	1.6Easy	en
Longest Prime Sum	0.00	6	951	842	89%	2.2Easy	en
Longest path in a DAG	0.01	472	219	183	84%	3.9Medium	en
Marathon	0.00	226	52	38	73%	6.9Hard	en
Massive Card Game	0.02	102	1159	1028	89%	2.4Easy	en
Maximum Clique	0.00	314	156	100	64%	2.0 - 5.7Hard	en
Minimal Fibonacci Sums	0.00	82	591	531	90%	2.0Easy	en sv
Multiplication Table	0.00	72	439	348	79%	2.3 - 2.7Easy	en
Mårten's DFS	0.03	514	142	97	68%	3.7 - 4.4Medium	en sv
N-sum	0.00	15	11222	10755	96%	1.2Easy	en
Odd A's, Even B's	0.00	64	223	185	83%	4.2Medium	en
Odd Echo	0.00	6	13042	12122	93%	1.2Easy	en
Popularity Contest	0.01	72	876	822	94%	1.8Easy	en
Positive Divisors	0.00	95	422	348	82%	2.8Medium	en
Primality	0.00	34	383	238	62%	2.3 - 5.0Medium	en
Prime Count	0.02	446	257	82	32%	3.0 - 8.1Hard	en
Product Divisors	0.09	373	113	82	73%	5.9Hard	en
Sailing Friends	0.01	191	403	372	92%	2.1Easy	en
Shortest Composite Sum	0.00	28	243	204	84%	3.6Medium	en
Subcommittees	0.00	86	94	71	76%	3.8Medium	en
Triangle Area	0.00	15	12778	12244	96%	1.2Easy	en
Triangle Drama	0.00	105	203	187	92%	2.6Easy	en
Trip Planning	0.03	124	504	421	84%	3.5Medium	en
Two-sum	0.00	6	15381	14687	95%	1.2Easy	en
Varied Amusements	0.00	66	380	313	82%	2.2 - 2.9Medium	en
Vector Functions	0.03	575	657	523	80%	3.1Medium	en