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Advent of Code: 2016 Day 3
function parse(input) {
return input.split("\n").map((l) =>
l
.trim()
.split(/\s+/)
.map((s) => Number(s))
);
}
function countTriangles(sides) {
let validTriangles = 0;
for (let triangle of sides) {
const [a, b, c] = triangle.sort((a, b) => a - b);
validTriangles += a + b > c ? 1 : 0;
}
return validTriangles;
}
function part1(input) {
return countTriangles(parse(input));
}
part1(puzzleInput)
function transposed(input) {
const triangleM = parse(input);
let transposedM = triangleM[0].map((_, i) => triangleM.map((row) => row[i]));
return AOC.chunk(transposedM.flat(), 3);
}
function part2(input) {
return countTriangles(transposed(input));
}
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