Project Euler

projecteuler.18.js

"use strict";

let xss =
`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`
.split("\n").map(row => row.split(" ").map(x => Number(x.trim())));

for(let i = xss.length - 2; i >= 0; --i) {
    let xs = xss[i];
    let ys = xss[i+1];
    for (let j = 0; j < xs.length; ++j) {
        xs[j] = xs[j] + Math.max(ys[j], ys[j+1]);
    }
}
console.log(xss[0][0]);