mirror of
https://github.com/janet-lang/janet
synced 2024-11-25 09:47:17 +00:00
24 lines
466 B
Plaintext
24 lines
466 B
Plaintext
# Find the maximum path from the top (root)
|
|
# of the triangle to the leaves of the triangle.
|
|
|
|
(defn myfold [xs ys]
|
|
(let [xs1 (tuple/prepend xs 0)
|
|
xs2 (tuple/append xs 0)
|
|
m1 (map + xs1 ys)
|
|
m2 (map + xs2 ys)]
|
|
(map max m1 m2)))
|
|
|
|
(defn maxpath [t]
|
|
(extreme > (reduce myfold () t)))
|
|
|
|
# Test it
|
|
# Maximum path is 3 -> 10 -> 3 -> 9 for a total of 25
|
|
|
|
(def triangle
|
|
'[[3]
|
|
[7 10]
|
|
[4 3 7]
|
|
[8 9 1 3]])
|
|
|
|
(print (maxpath triangle))
|