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97 lines
2.9 KiB
97 lines
2.9 KiB
#reading input |
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with open('input18.txt','r') as f: |
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inp = f.read().splitlines(keepends=False) |
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cubes = [] |
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sides = {} |
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surface = 0 |
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maxX = None |
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maxY = None |
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maxZ = None |
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minX = None |
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minY = None |
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minZ = None |
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bubbles = [] |
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bubbleSides = {} |
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insideSurface = 0 |
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for line in inp: |
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x, y, z = line.split(',') |
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x = int(x) |
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y = int(y) |
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z = int(z) |
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if maxX == None or x > maxX: |
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maxX = x |
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if minX == None or x < minX: |
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minX = x |
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if maxY == None or y > maxY: |
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maxY = y |
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if minY == None or y < minY: |
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minY = y |
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if maxZ == None or z > maxZ: |
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maxZ = z |
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if minZ == None or z < minZ: |
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minZ = z |
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cubes.append((x, y, z)) |
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#main function |
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for cube in cubes: |
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x, y, z = cube |
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sides[((x - 1, x),(y, y),(z, z))] = sides.get(((x - 1, x),(y, y),(z, z)), 0) + 1 |
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sides[((x, x + 1),(y, y),(z, z))] = sides.get(((x, x + 1),(y, y),(z, z)), 0) + 1 |
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sides[((x, x),(y - 1, y),(z, z))] = sides.get(((x, x),(y - 1, y),(z, z)), 0) + 1 |
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sides[((x, x),(y, y + 1),(z, z))] = sides.get(((x, x),(y, y + 1),(z, z)), 0) + 1 |
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sides[((x, x),(y, y),(z - 1, z))] = sides.get(((x, x),(y, y),(z - 1, z)), 0) + 1 |
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sides[((x, x),(y, y),(z, z + 1))] = sides.get(((x, x),(y, y),(z, z + 1)), 0) + 1 |
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for side in sides: |
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if sides[side] == 1: |
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surface += 1 |
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for x in range(minX, maxX + 1): |
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for y in range(minY, maxY + 1): |
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for z in range(minZ, maxZ + 1): |
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bubbles.append((x, y, z)) |
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for cube in cubes: |
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if cube in bubbles: |
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bubbles.remove(cube) |
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outsideBubbles = [] |
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for bubble in bubbles: |
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x, y, z = bubble |
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if x in [minX, maxX] or y in [minY, maxY] or z in [minZ, maxZ]: |
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outsideBubbles.append((x, y, z)) |
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done = False |
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while not done: |
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done = True |
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for bubble in outsideBubbles: |
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bubbleSides.setdefault(bubble, 1) |
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for bubble in bubbles: |
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x, y, z = bubble |
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if any(i in bubbleSides for i in((x - 1, y, z), (x + 1, y, z), (x, y - 1, z), (x, y + 1, z), (x, y, z - 1), (x, y, z + 1))): |
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if (x, y, z) not in outsideBubbles: |
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outsideBubbles.append((x, y, z)) |
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done = False |
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for bubble in outsideBubbles: |
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if bubble in bubbles: |
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bubbles.remove(bubble) |
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bubbleSides = {} |
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for bubble in bubbles: |
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x, y, z = bubble |
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bubbleSides[((x - 1, x),(y, y),(z, z))] = bubbleSides.get(((x - 1, x),(y, y),(z, z)), 0) + 1 |
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bubbleSides[((x, x + 1),(y, y),(z, z))] = bubbleSides.get(((x, x + 1),(y, y),(z, z)), 0) + 1 |
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bubbleSides[((x, x),(y - 1, y),(z, z))] = bubbleSides.get(((x, x),(y - 1, y),(z, z)), 0) + 1 |
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bubbleSides[((x, x),(y, y + 1),(z, z))] = bubbleSides.get(((x, x),(y, y + 1),(z, z)), 0) + 1 |
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bubbleSides[((x, x),(y, y),(z - 1, z))] = bubbleSides.get(((x, x),(y, y),(z - 1, z)), 0) + 1 |
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bubbleSides[((x, x),(y, y),(z, z + 1))] = bubbleSides.get(((x, x),(y, y),(z, z + 1)), 0) + 1 |
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for side in bubbleSides: |
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if bubbleSides[side] == 1: |
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insideSurface += 1 |
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print(surface - insideSurface) |