aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Data commit

Browse source
This commit is contained in:
Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

29
Task/Permutations-by-swapping/EchoLisp/permutations-by-swapping.l Normal file
View file

@ -0,0 +1,29 @@
(lib 'list)
(for/fold (sign 1) ((σ (in-permutations 4)) (count 100))
(printf "perm: %a count:%4d sign:%4d" σ count sign) (* sign -1))
perm: (0 1 2 3) count: 0 sign: 1
perm: (0 1 3 2) count: 1 sign: -1
perm: (0 3 1 2) count: 2 sign: 1
perm: (3 0 1 2) count: 3 sign: -1
perm: (3 0 2 1) count: 4 sign: 1
perm: (0 3 2 1) count: 5 sign: -1
perm: (0 2 3 1) count: 6 sign: 1
perm: (0 2 1 3) count: 7 sign: -1
perm: (2 0 1 3) count: 8 sign: 1
perm: (2 0 3 1) count: 9 sign: -1
perm: (2 3 0 1) count: 10 sign: 1
perm: (3 2 0 1) count: 11 sign: -1
perm: (3 2 1 0) count: 12 sign: 1
perm: (2 3 1 0) count: 13 sign: -1
perm: (2 1 3 0) count: 14 sign: 1
perm: (2 1 0 3) count: 15 sign: -1
perm: (1 2 0 3) count: 16 sign: 1
perm: (1 2 3 0) count: 17 sign: -1
perm: (1 3 2 0) count: 18 sign: 1
perm: (3 1 2 0) count: 19 sign: -1
perm: (3 1 0 2) count: 20 sign: 1
perm: (1 3 0 2) count: 21 sign: -1
perm: (1 0 3 2) count: 22 sign: 1
perm: (1 0 2 3) count: 23 sign: -1