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32 lines (25 loc) · 653 Bytes
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z.py
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32 lines (25 loc) · 653 Bytes
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import sys
from collections import deque
input = sys.stdin.readline
def main():
n = int(input())
edge = [[] for _ in range(n)]
for _ in range(n - 1):
u, v = (int(i) - 1 for i in input().split())
edge[u].append(v)
edge[v].append(u)
grp = [-1 for _ in edge]
q = deque()
grp[0] = 0
q.append(0)
while q:
p = q.popleft()
for e in edge[p]:
if grp[e] == -1:
grp[e] = 1 - grp[p]
q.append(e)
gi = sum(grp) * 2 >= n
lis = [i + 1 for i, g in enumerate(grp) if g == gi]
print(*lis[: n // 2])
if __name__ == "__main__":
main()