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#!/usr/local/bin/node
//
// See ../README.md
//
//
// Run as: node ch-2.js < input-file
//
let numbers =
require ("fs")
. readFileSync (0) // Read all.
. toString () // Turn it into a string.
. split ("\n") // Split on newlines.
. filter (_ => _ . length) // Filter out empty lines.
. map (_ => _ . split (/\s+/) // Split on white space.
. map (_ => Number (_))) // Convert to number.
for (let x = numbers . length - 2; x >= 0; x --) {
for (let y = 0; y < numbers [x] . length; y ++) {
numbers [x] [y] += Math . min (numbers [x + 1] [y],
numbers [x + 1] [y + 1])
}
}
console . log (numbers [0] [0])
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