This documentation is automatically generated by online-judge-tools/verification-helper
#define PROBLEM "https://onlinejudge.u-aizu.ac.jp/courses/library/3/DSL/1/DSL_1_B"
#include <iostream>
#include "datastructure/PotentializedUnionFind.hpp"
int main() {
std::cin.tie(0);
std::ios::sync_with_stdio(false);
int n, q;
std::cin >> n >> q;
PotentializedUnionFind<int> UF(n);
for (; q--;) {
int c, x, y, z;
std::cin >> c >> x >> y;
if (!c) {
std::cin >> z;
UF.merge(x, y, z);
} else {
if (UF.same(x, y))
std::cout << UF.diff(x, y) << '\n';
else
std::cout << '?' << '\n';
}
}
return 0;
}Traceback (most recent call last):
File "/opt/hostedtoolcache/Python/3.13.3/x64/lib/python3.13/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/3.13.3/x64/lib/python3.13/site-packages/onlinejudge_verify/languages/cplusplus.py", line 187, in bundle
bundler.update(path)
~~~~~~~~~~~~~~^^^^^^
File "/opt/hostedtoolcache/Python/3.13.3/x64/lib/python3.13/site-packages/onlinejudge_verify/languages/cplusplus_bundle.py", line 401, in update
self.update(self._resolve(pathlib.Path(included), included_from=path))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/hostedtoolcache/Python/3.13.3/x64/lib/python3.13/site-packages/onlinejudge_verify/languages/cplusplus_bundle.py", line 260, in _resolve
raise BundleErrorAt(path, -1, "no such header")
onlinejudge_verify.languages.cplusplus_bundle.BundleErrorAt: datastructure/PotentializedUnionFind.hpp: line -1: no such header