37 lines
745 B
Python
37 lines
745 B
Python
import sys
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from lib import *
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data = int(open(0).read().strip())
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part2 = True
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def is_wall(x, y):
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v = x*x + 3*x + 2*x*y + y + y*y
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v += data
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bin_count = bin(v).count("1")
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if bin_count % 2 == 0:
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return False
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return True
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seen = set()
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poss = [(1, 1)]
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for step in range(51):
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nposs = []
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for pos in poss:
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if pos in seen:
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continue
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seen.add(pos)
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if not part2 and pos == (31, 39):
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print(step)
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sys.exit(0)
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for (x, y) in [(-1, 0), (1, 0), (0, 1), (0, -1)]:
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nx, ny = pos[0] + x, pos[1] + y
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if nx >= 0 and ny >= 0 and not is_wall(nx, ny):
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nposs.append((nx, ny))
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poss = nposs
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if part2:
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print(len(seen))
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