58 lines
1.5 KiB
Python
58 lines
1.5 KiB
Python
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#!/usr/bin/env python3
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import sys
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from operator import mul
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from functools import reduce
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from itertools import tee, takewhile, islice
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packet = sys.stdin.readline().rstrip()
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bitstr = "".join([f"{int(x,16):04b}" for x in packet])
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ops = {
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0: sum,
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1: lambda l: reduce(mul, l, 1),
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2: min,
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3: max,
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5: lambda l: 1 if l[0] > l[1] else 0,
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6: lambda l: 1 if l[0] < l[1] else 0,
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7: lambda l: 1 if l[0] == l[1] else 0,
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}
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def decode(p):
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ver = int(p[0:3],2)
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pid = int(p[3:6],2)
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versum = ver
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if pid == 4:
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a, b = tee(map(lambda b: (int(b[0],2), int("".join(b[1:]), 2)),
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zip(*(iter(p[6:]),)*5)))
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n = sum(takewhile(lambda s: s, map(lambda x: x[0], a))) + 1
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val = reduce(lambda a, b: a << 4 | b[1], islice(b, n), 0)
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plen = 6 + n * 5
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return plen, val, ver
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else:
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typ = int(p[6],2)
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rvals = []
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start = 7+(11 if typ else 15)
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plen = int(p[7:start],2)
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if typ:
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for i in range(plen):
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l, v, vn = decode(p[start:])
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rvals.append(v)
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start += l
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versum+=vn
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else:
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while plen:
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l, v, vn = decode(p[start:start+plen])
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rvals.append(v)
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start += l
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plen -= l
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versum+=vn
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rval = ops[pid](rvals)
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return start, rval, versum
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_, gold, silver = decode(bitstr)
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print(f"Silver: {silver}\nGold: {gold}")
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