57 lines
1.1 KiB
Python
57 lines
1.1 KiB
Python
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from lib import str_to_ints
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from collections import defaultdict
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def get_graph(data):
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g = defaultdict(set)
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for line in data.splitlines():
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fs = str_to_ints(line)
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l = fs[0]
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for r in fs[1:]:
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g[l].add(r)
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g[r].add(l)
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return g
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def part_1(data):
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g = get_graph(data)
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to_visit = [0]
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seen = set()
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while to_visit:
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c = to_visit.pop()
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if c in seen:
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continue
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seen.add(c)
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for nb in g[c]:
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to_visit.append(nb)
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print(len(seen))
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def part_2(data):
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g = get_graph(data)
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group_count = 0
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seen = set()
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for c in g.keys():
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if c in seen:
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continue
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group_count += 1
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to_visit = [c]
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while to_visit:
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c = to_visit.pop()
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if c in seen:
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continue
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seen.add(c)
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for nb in g[c]:
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to_visit.append(nb)
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print(group_count)
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def main():
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data = open(0).read().strip()
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part_1(data)
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part_2(data)
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if __name__ == "__main__":
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main()
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