This documentation is automatically generated by online-judge-tools/verification-helper
# verification-helper: PROBLEM https://onlinejudge.u-aizu.ac.jp/courses/library/3/DSL/1/DSL_1_B
from pathlib import Path
import sys
sys.path.append(str(Path(__file__).resolve().parent.parent.parent.parent))
from src.data_structure.WeightedUnionFind import WeightedUnionFind
n, Q = map(int, input().split())
UF = WeightedUnionFind(n)
for _ in range(Q):
query = list(map(int, input().split()))
if query[0] == 0:
x, y, z = query[1:]
UF.unite(y, x, z)
else:
x, y = query[1:]
res = UF.diff(y, x)
if res is None:
print("?")
else:
print(res)
Traceback (most recent call last):
File "/opt/hostedtoolcache/Python/3.11.4/x64/lib/python3.11/site-packages/onlinejudge_verify/documentation/build.py", line 81, in _render_source_code_stat
bundled_code = language.bundle(
^^^^^^^^^^^^^^^^
File "/opt/hostedtoolcache/Python/3.11.4/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/python.py", line 108, in bundle
raise NotImplementedError
NotImplementedError