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44 lines
1.0 KiB
Python
44 lines
1.0 KiB
Python
3 years ago
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import itertools
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with open("input") as f:
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connections = [n.strip() for n in f.readlines()]
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GRAPH = dict()
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LOCATIONS = set()
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for connection in connections:
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[location_a, _, location_b, _, distance] = connection.split(" ")
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distance = int(distance)
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LOCATIONS.add(location_a)
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LOCATIONS.add(location_b)
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GRAPH[(location_a, location_b)] = distance
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GRAPH[(location_b, location_a)] = distance
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def calculate_distance(route):
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dist = 0
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for i in range(len(route) - 1):
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location_a = route[i]
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location_b = route[i + 1]
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if (location_a, location_b) not in GRAPH:
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return None
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dist += GRAPH[(location_a, location_b)]
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return dist
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LONGEST_ROUTE = None
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LONGEST_DISTANCE = None
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for route in itertools.permutations(LOCATIONS, len(LOCATIONS)):
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dist = calculate_distance(route)
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if dist is None:
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continue
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if LONGEST_DISTANCE is None or dist > LONGEST_DISTANCE:
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LONGEST_DISTANCE = dist
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LONGEST_ROUTE = route
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print(LONGEST_ROUTE)
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print(LONGEST_DISTANCE)
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