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Permutations (Posted on 2003-07-02) Difficulty: 3 of 5
Find an algorithm (subroutine) that when called repeatedly with the same character-string variable that is initialized with n characters, all different, will cycle through all the permutations of those n characters, so that for example, when called 24 times with a string of length 4, will have cycled that string through all 24 permutations and returned it to its initial state.

See The Solution Submitted by Charlie    
Rating: 4.0000 (3 votes)

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re(2): Solution | Comment 11 of 14 |
(In reply to re: Solution by Gamer)

Just to make things interesting, I'll start in the middle:

Input: BDAC

BDCA
CABD
CADB
CBAD
CBDA
CDAB
CDBA
DABC
DACB
DBAC
DBCA
DCAB
DCBA
ABCD <- full reverse here
ABDC
ACBD
ACDB
ADBC
ADCB
BACD
BADC
BCAD
BCDA
BDAC

  Posted by friedlinguini on 2003-07-03 18:20:38

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