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@dholbrook
Last active December 21, 2015 03:48
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object Euler18 extends App {
val s =
"""|75
|95 64
|17 47 82
|18 35 87 10
|20 04 82 47 65
|19 01 23 75 03 34
|88 02 77 73 07 63 67
|99 65 04 28 06 16 70 92
|41 41 26 56 83 40 80 70 33
|41 48 72 33 47 32 37 16 94 29
|53 71 44 65 25 43 91 52 97 51 14
|70 11 33 28 77 73 17 78 39 68 17 57
|91 71 52 38 17 14 91 43 58 50 27 29 48
|63 66 04 68 89 53 67 30 73 16 69 87 40 31
|04 62 98 27 23 09 70 98 73 93 38 53 60 04 23""".stripMargin
type Row = Vector[Int]
type Triangle = Vector[Row]
val t: Triangle = for {r <- s.split("\\n").toVector} yield
for {c <- r.split(" ").toVector} yield c.toInt
def merge(t: Row, b: Row): Row =
for {i <- t.indices.toVector} yield t(i) + Math.max(b(i), b(i+1))
val r = t.reduceRight(merge)(0)
assert(r == 1074)
println(r)
}
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