29 lines
866 B
Python
29 lines
866 B
Python
from part1 import *
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thoughts = \
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"""
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So, we can place an obstacle on each of the 130*130 - #obstacles = 16900
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- obstacles positions, but the initial path only covers 1512 positions
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(thus 1512 - 1 = 1511 steps). By instead placing an obstacle on each of
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those steps, we can find a loop.
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The other thing we need to do, is detect loops. For that, It would be
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nice to store both positions and directions to establish uniqueness,
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or just check whether it is the fifth time in a position (as we have
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then travelled to that position at least twice from at least one
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position; see Pigeonhole principle).
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"""
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if __name__ == "__main__":
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m = Map()
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#m.load_map("testinput")
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m.load_map("input")
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while m.step():
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# After each step, we can fork the map and add the obstacle.
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print(m.pos, m.direction)
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#m.show()
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print(len(m.trace), m.trace)
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print(len(set(m.trace)))
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