70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
""" https://adventofcode.com/2018/day/8 """
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def readFile():
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import os.path as p
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dName = p.dirname(__file__)
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fName = p.basename(__file__).split(".")[0]
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with open(p.join(dName, "input", f"{fName}.txt"), "r") as f:
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data = f.read()
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return [int(val) for val in data.split(" ")]
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class Node:
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def __init__(self, numChildren, numMeta):
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self.numChildren = numChildren
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self.children = []
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self.numMeta = numMeta
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self.meta = []
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def parse(vals, i):
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nodes = []
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size = len(vals)
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while i < len(vals):
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node = Node(vals[i], vals[i+1])
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i += 2
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if not node.numChildren:
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for m in range(node.numMeta):
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node.meta.append(vals[i + m])
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nodes.append(node)
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i += node.numMeta
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return nodes, i
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else:
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for c in range(node.numChildren):
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temp, i = parse(vals, i)
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node.children += temp
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for m in range(node.numMeta):
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node.meta.append(vals[i + m])
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nodes.append(node)
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i += node.numMeta
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if i >= size:
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return nodes[0]
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else:
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return nodes, i
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def part1(node):
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metadata = 0
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for child in node.children:
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metadata += part1(child)
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for meta in node.meta:
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metadata += meta
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return metadata
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def part2(node):
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value = 0
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if not node.numChildren:
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for meta in node.meta:
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value += meta
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else:
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for meta in node.meta:
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try:
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value += part2(node.children[meta - 1])
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except IndexError:
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pass
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return value
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if __name__ == "__main__":
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vals = readFile()
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#vals = [int(val) for val in "2 3 0 3 10 11 12 1 1 0 1 99 2 1 1 2".split(" ")]
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node = parse(vals, 0)
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print(f"Part 1: {part1(node)}")
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print(f"Part 2: {part2(node)}") |