60 lines
1.5 KiB
Python
60 lines
1.5 KiB
Python
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import re
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from grid import Grid
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EX = [
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"#1 @ 1,3: 4x4",
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"#2 @ 3,1: 4x4",
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"#3 @ 5,5: 2x2",
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]
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def main():
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with open("day3.txt", "rt") as f:
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lines = [line.rstrip() for line in f.readlines()]
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# Part 1
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g = Grid()
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for line in lines:
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ident, left, top, width, height = parse_line(line)
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for i in range(int(width)):
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for j in range(int(height)):
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x = int(left) + i
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y = int(top) + j
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g.setv(x, y, g.getv(x, y) + 1)
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n = get_overlaps(g)
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print(n)
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# Part 2
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g = Grid()
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over = []
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for line in lines:
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ident, left, top, width, height = parse_line(line)
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for i in range(int(width)):
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for j in range(int(height)):
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x = int(left) + i
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y = int(top) + j
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current_v = g.getv(x, y)
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if current_v == None:
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over.append(int(ident))
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continue
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elif current_v == 0:
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g.setv(x, y, int(ident))
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else:
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over += [int(ident), current_v]
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g.setv(x, y, None)
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print(set(v for _, _, v in g.values_gen()).difference(set(over)))
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LINE_RE = re.compile(r"#(\d+) @ (\d+),(\d+): (\d+)x(\d+)")
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def parse_line(line):
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match = LINE_RE.match(line)
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return match.groups()
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def get_overlaps(grid):
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return sum([v > 1 for _, _, v in grid.values_gen()])
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if __name__ == "__main__":
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main()
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