62 lines
1.3 KiB
Python
62 lines
1.3 KiB
Python
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#!/usr/bin/python
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def read_file(filename, chunk=1024):
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file = open(filename, 'r')
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while True:
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line = file.read(chunk)
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if not line:
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break
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yield line
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def getFloorPlanKey(posX, posY):
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return "%dx%d" % (posX, posY)
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def moveSanta(posX, posY, direction):
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if direction == '>':
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posX = posX + 1
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if direction == '<':
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posX = posX - 1
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if direction == '^':
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posY = posY + 1
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if direction == 'v':
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posY = posY - 1
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return (posX, posY)
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def main():
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posX1 = 0
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posY1 = 0
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posX2 = 0
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posY2 = 0
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houses = 1
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floorPlan = dict()
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floorPlan[getFloorPlanKey(0, 0)] = 1
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for line in read_file('input', 2):
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(posX1, posY1) = moveSanta(posX1, posY1, line[0])
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key1 = getFloorPlanKey(posX1, posY1)
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if key1 not in floorPlan:
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houses = houses + 1
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floorPlan[key1] = 0
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floorPlan[key1] = floorPlan[key1] + 1
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if len(line) < 2:
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break
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(posX2, posY2) = moveSanta(posX2, posY2, line[1])
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key2 = getFloorPlanKey(posX2, posY2)
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if key2 not in floorPlan:
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houses = houses + 1
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floorPlan[key2] = 0
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floorPlan[key2] = floorPlan[key2] + 1
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print houses
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if __name__ == "__main__":
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main()
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