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25 lines
471 B
Janet
25 lines
471 B
Janet
# Find the maximum path from the top (root)
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# of the triangle to the leaves of the triangle.
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(defn myfold [xs ys]
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(let [xs1 (tuple.prepend xs 0)
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xs2 (tuple.append xs 0)
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m1 (map + xs1 ys)
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m2 (map + xs2 ys)]
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(map max m1 m2)))
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(defn maxpath [t]
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(extreme > (reduce myfold () t)))
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# Test it
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# Maximum path is 3 -> 10 -> 3 -> 9 for a total of 25
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(def triangle
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'[[3]
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[7 10]
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[4 3 7]
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[8 9 1 3]
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])
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(print (maxpath triangle))
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