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Diffstat (limited to '46-50/49.hs')
| -rw-r--r-- | 46-50/49.hs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/46-50/49.hs b/46-50/49.hs new file mode 100644 index 0000000..afe25ad --- /dev/null +++ b/46-50/49.hs @@ -0,0 +1,4 @@ +gray :: Int -> [String] + +gray 0 = [""] +gray n = (map ('0':) last) ++ (map ('1':) $ reverse last) where last = gray (n - 1) |