70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
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#!/usr/bin/python
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import re
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def read_file(filename):
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file = open(filename, 'r')
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while True:
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line = file.readline()
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if not line:
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break
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yield line
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def getPosKey(posX, posY):
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return "%03d%03d" % (posX, posY)
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def action_turn_on(data, posX1, posY1, posX2, posY2):
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changed = 0
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for posX in range(posX1, posX2+1):
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for posY in range(posY1, posY2+1):
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key = getPosKey(posX, posY)
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if key not in data:
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data[key] = 0
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data[key] = data[key] + 1
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changed = changed + 1
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return (data, changed, 0)
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def action_turn_off(data, posX1, posY1, posX2, posY2):
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changed = 0
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for posX in range(posX1, posX2+1):
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for posY in range(posY1, posY2+1):
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key = getPosKey(posX, posY)
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if key not in data:
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data[key] = 0
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if data[key] > 0:
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data[key] = data[key] - 1
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changed = changed + 1
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return (data, 0, changed)
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def main():
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RE_COORD = re.compile(r" (\d+),(\d+) through (\d+),(\d+)$")
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lOn = 0
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grid = dict()
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for line in read_file('input'):
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match = re.search(RE_COORD, line)
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posX1 = (int)(match.group(1))
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posY1 = (int)(match.group(2))
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posX2 = (int)(match.group(3))
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posY2 = (int)(match.group(4))
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changedOn = 0
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changedOff = 0
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if line.startswith("turn on "):
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(grid, changedOn, changedOff) = action_turn_on(grid, posX1, posY1, posX2, posY2)
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if line.startswith("turn off "):
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(grid, changedOn, changedOff) = action_turn_off(grid, posX1, posY1, posX2, posY2)
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if line.startswith("toggle "):
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(grid, changedOn, changedOff) = action_turn_on(grid, posX1, posY1, posX2, posY2)
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(grid, changedOn, changedOff) = action_turn_on(grid, posX1, posY1, posX2, posY2)
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changedOn = changedOn * 2
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changedOff = changedOff * 2
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lOn = lOn + changedOn - changedOff
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print lOn
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if __name__ == "__main__":
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main()
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