25 lines
624 B
JavaScript
25 lines
624 B
JavaScript
const fs = require('fs');
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const input = fs.readFileSync('input.txt', 'utf-8').split('\n')[0].split(' ').map(Number);
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function parse(arr) {
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if (arr[0] == 0) {
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return ([2 + arr[1], arr.slice(2, 2 + arr[1]).reduce((a, b) => a + b)]);
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}
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let children = [];
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let pointer = 2;
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for (let i = 0; i < arr[0]; i++) {
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let child = parse(arr.slice(pointer, arr.length));
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pointer += child[0];
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children.push(child[1]);
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}
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let meta = 0;
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let indexes = arr.slice(pointer, pointer + arr[1])
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for (let i of indexes) {
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meta += children[i - 1] || 0;
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}
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return [pointer + arr[1], meta];
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}
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let v = parse(input)[1];
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console.log(v);
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