This documentation is automatically generated by online-judge-tools/verification-helper
from collections import deque
def bfs(n, G):
# return max length path from node n
# G = [[[n0, d0], [n1, d1]], [[n2, d2], ...], ...]
dist = [None] * len(G)
que = deque([n])
dist[n] = 0
while que:
v = que.popleft()
d = dist[v]
for w in G[v]:
if dist[w[0]] is not None:
continue
dist[w[0]] = d + w[1]
que.append(w[0])
d = max(dist)
return dist.index(d), d
N = int(input())
G = [[] for _ in range(N)]
for _ in range(N - 1):
A, B = [int(i) for i in input().split(" ")]
G[A - 1].append([B - 1, 1])
G[B - 1].append([A - 1, 1])
u, _ = bfs(0, G)
_, d = bfs(u, G)
print(d + 1)
Traceback (most recent call last):
File "/opt/hostedtoolcache/Python/3.11.3/x64/lib/python3.11/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/hostedtoolcache/Python/3.11.3/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/python.py", line 96, in bundle
raise NotImplementedError
NotImplementedError