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authorDeterminant <ted.sybil@gmail.com>2017-05-29 16:33:04 -0400
committerDeterminant <ted.sybil@gmail.com>2017-05-29 16:33:04 -0400
commitd0aa856bedb0c0223b4ce2a67f5582b8eadf3682 (patch)
tree98d300c8cef2cc060dfdecd0e2de15575621cdc4 /46-50/49.hs
parent9db0008777cc4cd9f07e14a3458e3d903e3cc4f6 (diff)
finish v5
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+gray :: Int -> [String]
+
+gray 0 = [""]
+gray n = (map ('0':) last) ++ (map ('1':) $ reverse last) where last = gray (n - 1)