49 lines
1.0 KiB
Python
49 lines
1.0 KiB
Python
import os
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input = open(os.path.dirname(__file__) +
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"/input.txt", "r").readlines()
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beacons = []
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sensors = []
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distance = []
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for line in input:
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l = line.strip().split()
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sx = int(l[2].split('=')[1].split(',')[0])
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sy = int(l[3].split('=')[1].split(':')[0])
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bx = int(l[8].split('=')[1].split(',')[0])
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by = int(l[9].split('=')[1])
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d = abs(bx-sx)+abs(by-sy)
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distance.append(d)
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beacons.append((bx, by))
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sensors.append((sx, sy))
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print(sx, sy, bx, by, d)
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def getcoverage(b, Y):
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coverage = set()
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(x, y) = sensors[b]
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d0 = distance[i]
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print("check", x, y, d0)
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for X in range(x-d0, x+d0):
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if (abs(x-X)+abs(y-Y)) <= d0:
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coverage.add((X, Y))
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return coverage
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testy = 2000000
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fullcoverage = set()
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for i in range(len(sensors)):
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cov = getcoverage(i, testy)
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fullcoverage.update(cov)
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testset = set()
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for s in fullcoverage:
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if s[1] == testy:
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testset.add(s)
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nonbeacons = testset.difference(set(beacons))
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print(len(nonbeacons))
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