[Day 25](https://adventofcode.com/2018/day/25)[Day 18](https://adventofcode.com/2018/day/18)[Day 21](https://adventofcode.com/2018/day/21)Day 19[Day 16](https://adventofcode.com/2018/day/16)[Day 14](https://adventofcode.com/2018/day/14)[Day 13](https://adventofcode.com/2018/day/13)[Day 12](https://adventofcode.com/2018/day/12)[Day 11](https://adventofcode.com/2018/day/11)[Day 10](https://adventofcode.com/2018/day/10)[Day 9](https://adventofcode.com/2018/day/9)[Day 7](https://adventofcode.com/2018/day/7)[Day 6](https://adventofcode.com/2018/day/6)[Day 5](https://adventofcode.com/2018/day/5)[Day 4](https://adventofcode.com/2018/day/4)[Day 3](https://adventofcode.com/2018/day/3)Advent of Code: [Day 2](https://adventofcode.com/2018/day/2)[Day 1](https://adventofcode.com/2018/day/1)
[Day 8](https://adventofcode.com/2018/day/8)
function* getData () {
yield* input.split(" ").map(Number);
}
function makeTree (data) {
function recur () {
let tree = {};
tree["metadata"] = [];
tree["children"] = [];
const numC = data.next().value;
const numM = data.next().value;
for (let i = 0; i < numC; i++) {
tree["children"].push(recur());
}
for (let i = 0; i < numM; i++) {
tree["metadata"].push(data.next().value);
}
return tree;
}
return recur();
}
tree = makeTree(getData())
function addMetadata (subtree) {
let sum = 0;
for (const m of subtree["metadata"]) {
sum += m;
}
for (const c of subtree["children"]) {
sum += addMetadata(c);
}
return sum;
}
metadataEntrySum = addMetadata(tree)
function getRootValue (subtree) {
if (!subtree) return 0;
let sum = 0;
for (const m of subtree["metadata"]) {
if (subtree["children"].length === 0) {
sum += m;
} else {
sum += getRootValue(subtree["children"][m-1]);
}
}
return sum;
}
rootValue = getRootValue(tree)
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