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| author | Nathan Lasseter <nathan.je.lasseter@googlemail.com> | 2009-10-04 00:56:56 +0100 |
|---|---|---|
| committer | Nathan Lasseter <nathan.je.lasseter@googlemail.com> | 2009-10-04 00:56:56 +0100 |
| commit | 0248ed34ce3d05228bc5084669c3a27933be0c2e (patch) | |
| tree | b9c4990344b0863a2af851b5917c49f3a5f03e6b /p15b.erl | |
| parent | 00686037d57eb0a0d5eba6eeb6fcc9692e8b59f6 (diff) | |
first commit
Diffstat (limited to 'p15b.erl')
| -rwxr-xr-x | p15b.erl | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/p15b.erl b/p15b.erl new file mode 100755 index 0000000..229c60a --- /dev/null +++ b/p15b.erl @@ -0,0 +1,11 @@ +-module(problem15). +-export([solve/0]). + +solve() -> + length(perms("DDDDDDDDDDDDDDDDDDDDRRRRRRRRRRRRRRRRRRRR")). + +% Tack, Joe. +perms([]) -> + [[]]; +perms(L) -> + [[H|T] || H <- L, T <- perms(L--[H])]. |