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| (defn longest [xs ys] (if (> (count xs) (count ys)) xs ys)) | |
| (def lcs | |
| (memoize | |
| (fn [[x & xs] [y & ys]] | |
| (cond | |
| (or (= x nil) (= y nil) ) nil | |
| (= x y) (cons x (lcs xs ys)) | |
| :else (longest (lcs (cons x xs) ys) (lcs xs (cons y ys))))))) |
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