Tag: combinatorics

47 Determine if a coin system is Canonical 2016-10-13T20:27:19.410

44 Extending OEIS: Counting Diamond Tilings 2015-06-04T12:22:11.520

43 Count sums of two squares 2015-11-26T00:38:01.640

38 The Urinal Protocol 2015-03-18T14:56:06.547

37 Lazy battleship placement 2014-03-04T04:51:30.907

36 Catalan Numbers 2015-12-09T17:39:41.920

36 Has My Pie Been Bisected? 2016-06-04T04:29:54.907

33 Every word from babab to zyzyz 2017-01-12T11:52:46.923

32 Generate Pascal's triangle 2011-10-20T18:16:53.283

32 Tic-tac-toe with only crosses 2016-01-06T18:15:11.410

31 Longest domino chain 2017-01-03T11:46:16.747

29 Which Friends characters were really the best friends? 2015-07-07T04:41:09.140

29 Stuffing primes in a box 2016-03-07T10:17:38.023

28 Number of Straight-Chain Alk*nes of given length 2016-12-13T22:58:51.363

27 List all multiplicative partitions of n 2016-12-26T22:38:07.357

27 Find Diffy Games 2017-03-30T18:48:27.120

26 Golf me some cash from the ATM 2015-01-06T16:22:11.683

26 Vampire Compatibility 2015-03-19T18:58:25.683

26 Hook length product 2015-05-31T23:21:02.410

26 Motzkin Numbers 2015-12-17T08:05:05.523

26 Enumerate rhyme schemes 2016-02-03T18:42:12.867

26 Case Permutation 2016-05-31T13:17:26.517

26 Arranging Bubbles 2017-01-12T18:12:53.280

25 Figure Out the Android Lock Pattern 2016-08-22T20:38:22.113

25 Absolute Sums of Sidi Polynomial Coefficients 2016-12-26T03:00:05.007

24 Android Lock Screen 2014-03-31T18:23:33.027

24 Compute the multinomial coefficient 2016-01-14T14:39:55.137

24 Deranged !Combinatorics: Compute the Subfactorial 2017-03-26T17:00:19.690

23 Bernoulli Numbers 2015-11-30T20:51:09.963

23 Partial factorisations of a positive integer 2016-07-29T06:05:22.490

23 List all ordered partitions of n 2016-09-22T09:01:35.817

23 Reuse your code! 2017-04-02T15:53:41.200

23 Determine How many Wheels There Are 2017-10-23T17:27:32.867

23 Find The Rank Of A Word 2018-01-18T17:11:27.830

22 Can you cast the spell? 2015-05-06T13:14:43.150

22 Calculate the partitions of N 2016-06-30T23:10:22.433

22 Number of cycles of a permutation 2016-08-01T23:29:31.680

21 Combinatorial products of unique primes 2014-09-21T20:01:40.183

21 Random ASCII Art of the Day #5: Diamond Tilings 2015-06-03T14:14:48.643

21 Calculate a Pedigree 2015-06-12T21:02:31.840

21 A penny saved is a penny 2016-10-20T20:14:44.367

21 ​L​o​o​p​ ​I​t​ 2018-01-11T12:37:16.153

20 Shortest power set implementation 2012-11-21T08:48:27.880

20 Build a pair of spies that will throw stones into a river 2014-06-12T23:26:10.767

20 Generate the shortest De Bruijn 2014-12-23T21:06:22.837

20 Rearranging the sequence 2016-02-03T21:49:26.677

19 The number of possible numeric outcomes of parenthesizations of 2^2^...^2 2013-05-09T15:16:05.430

19 Forming Polyominoes with a Chain of Rods 2014-12-04T22:38:49.200

19 Print all colorings of a 3x3 grid 2015-06-08T17:55:27.710

19 The Combinatorics of Transistor 2015-10-27T15:23:40.950

19 Sums of prime factors 2015-12-18T22:12:05.563

19 Anaglot Polygrams 2017-05-09T18:56:29.373

19 Number of distinct non-empty subsequences of binary expansion 2017-10-15T14:09:36.603

19 Pick-flatten a list 2017-11-06T19:59:57.757

19 Single swaps of an array 2018-01-01T22:12:46.740

19 Is it a shuffle? 2018-01-02T15:48:33.933

18 Random Golf of the Day #3: Integer Partitions 2015-02-23T15:25:03.613

18 Necklace splitting problem 2017-02-10T21:26:10.670

18 Rafting Problem (Knapsack variant) 2017-02-12T03:15:49.990

18 How many shuffles 2018-01-01T22:00:11.057

17 Code-Golf: Permutations 2012-03-06T05:11:13.233

17 Sorted Lexical Partition of a Number 2015-03-17T19:16:04.663

17 Finding the Deadlock 2015-05-23T19:39:45.770

17 The Coin Problem 2015-09-06T16:17:48.857

17 Finding sum-free partitions 2015-11-09T18:18:12.623

17 Enumerating N-Dimensional Vectors 2015-11-11T14:16:00.933

17 Counting Fountains 2015-12-26T10:21:17.700

17 Chocolate numbers 2016-02-15T03:50:34.007

17 Compute the Eulerian number 2016-10-19T15:44:14.187

17 Hold'em or Fold'em? 2017-01-31T19:51:55.597

17 Enumerate all possible grids of integers with constraints 2017-12-06T10:40:24.863

17 Conjugate permutations 2018-02-15T22:41:54.673

16 Draw a range of mountain ranges 2014-09-18T00:57:57.537

16 Building a long chain of words 2015-01-25T12:14:41.013

16 Inverse permutation index 2016-10-10T18:29:26.190

16 How many partitions contain only perfect squares? 2017-07-17T23:43:45.983

16 Hand patterns in a card game 2017-11-19T23:55:50.680

15 Decompose a permutation into cycles 2011-03-17T17:14:08.887

15 Order 40 sticks 2015-05-12T07:11:53.077

15 Find the sets of sums 2015-12-09T20:47:15.503

15 Minimum number of numbers to sum to exactly n 2015-12-10T00:57:17.163

15 Same-color arithmetic progressions 2016-02-11T23:04:12.767

15 Compress a maximal discrepancy-2 sequence 2017-05-23T22:56:18.540

15 BASKETBALL FRVR? 2017-07-05T13:44:51.447

15 How many partitions do I have? 2017-08-31T15:31:21.590

15 XKCD Calendar Facts 2017-12-19T12:37:02.300

15 Counting polystrips 2018-02-17T08:14:47.863

14 Permutation group operation 2011-03-10T23:16:59.450

14 Robot roadie needed to pack the truck 2015-01-04T14:45:21.333

14 Twelve-coin problem 2015-05-07T13:58:31.027

14 Fewest disk writes to defrag multiple files 2016-11-22T02:09:14.967

14 Count how many distance sequences are far from all others 2017-03-13T09:16:13.153

14 Find the Odd odds 2017-05-26T19:13:26.137

14 Find Subset Factors 2017-06-02T13:20:51.057

14 Finding approximate correlations 2017-06-03T19:19:07.807

14 Mod 2 Multinomial coefficients 2018-01-17T20:35:49.530

13 Write all possible Braille characters 2012-09-26T05:22:31.657

13 Generate the set of prepend-append permutations in lexicographically sorted order 2015-03-06T04:16:50.800

13 Permutations of the Fifteen Puzzle 2015-05-26T20:46:32.077