add year 2023 day 4

y2023/d04/__init__.py

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+__year__ = 2023
+__day__ = 4
+__title__ = "Scratchcards"

y2023/d04/cases/example.13.30.txt

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+Card 1: 41 48 83 86 17 | 83 86  6 31 17  9 48 53
+Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
+Card 3:  1 21 53 59 44 | 69 82 63 72 16 21 14  1
+Card 4: 41 92 73 84 69 | 59 84 76 51 58  5 54 83
+Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
+Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11

y2023/d04/solution.py

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+from pydantic.dataclasses import dataclass
+
+from aoc.lib.solution import SolutionBase
+
+import logging
+
+
+__all__ = ["Solution"]
+__log__ = logging.getLogger(__name__)
+
+
+@dataclass
+class Card:
+    id: int
+    winning: set[int]
+    numbers: set[int]
+
+
+class Solution(SolutionBase):
+    @staticmethod
+    def prepare(data):
+        return tuple(
+            Card(
+                id=int(card[5:]),
+                winning={int(number) for number in winning.split()},
+                numbers={int(number) for number in numbers.split()},
+            )
+            for card, winning, numbers in (
+                line.replace("|", ":").split(":") for line in data
+            )
+        )
+
+    @staticmethod
+    def part_01(data):
+        return sum(int(2 ** (len(card.winning & card.numbers) - 1)) for card in data)
+
+    @staticmethod
+    def part_02(data):
+        copies = [1] * len(data[0].winning)
+        result = 0
+        for card in data:
+            _count = copies.pop(0)
+            result += _count
+            copies.append(1)
+            for i in range(len(card.winning & card.numbers)):
+                copies[i] += _count
+        return result
+
+
+if __name__ == "__main__":
+    import aoc.lib.main
+
+    aoc.lib.main.main(Solution)