52 lines
1.4 KiB
Nim
52 lines
1.4 KiB
Nim
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import std/[cmdline, sequtils, setutils, strformat, strscans, strutils]
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var result = 0
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var fn = if paramCount() > 0: paramStr(1) else: "input_04.txt"
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var lines = readFile(fn).strip.splitLines
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# ASSUMPTION: lottery numbers are < 128
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type
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Card = ref object
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idx: int
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play, pot: set[int8]
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var cards: seq[Card]
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proc value(card: Card): int =
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(card.play * card.pot).len
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#proc `$`(card: Card): string =
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# return &"Card idx={card.idx}: value={card.value}"
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for i, line in lines:
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var cardno: int
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let cardspec = line.split(":", 1)
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if scanf(cardspec[0].strip, "Card$s$i", cardno):
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let card = new Card
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card.idx = i
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card.play = cardspec[1].split("|")[0].strip.splitWhitespace().mapIt(it.strip).mapIt(it.parseInt).mapIt(it.int8).toSet
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card.pot = cardspec[1].split("|")[1].strip.splitWhitespace().mapIt(it.strip).mapIt(it.parseInt).mapIt(it.int8).toSet
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#echo &"Card {card.idx}: {card.play}, {card.pot} => {card.value}"
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cards.add(card)
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var stack = cards
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while stack.len > 0:
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result += len(stack)
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var extra_cards: seq[Card]
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for card in stack:
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if card.value > 0:
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extra_cards.add(cards[card.idx + 1..min(card.idx + card.value, cards.len - 1)])
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stack = extra_cards
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#echo &"Cards processed: {cards.len}"
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echo &"Result: {result}"
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case fn:
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of "input_04.txt":
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assert result == 11787590
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of "sample_input_04.txt":
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assert result == 30
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