game.cpp: In function 'bool unite(int, int)':
game.cpp:13:22: error: 'swap' was not declared in this scope
13 | if (e[u] > e[v]) swap(u, v);
| ^~~~
game.cpp:13:22: note: suggested alternatives:
In file included from /usr/include/c++/10/regex:62,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:110,
from game.cpp:2:
/usr/include/c++/10/bits/regex.h:2141:5: note: 'std::__cxx11::swap'
2141 | swap(match_results<_Bi_iter, _Alloc>& __lhs,
| ^~~~
In file included from /usr/include/c++/10/bits/stl_pair.h:59,
from /usr/include/c++/10/bits/stl_algobase.h:64,
from /usr/include/c++/10/bits/specfun.h:45,
from /usr/include/c++/10/cmath:1927,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
from game.cpp:2:
/usr/include/c++/10/bits/move.h:189:5: note: 'std::swap'
189 | swap(_Tp& __a, _Tp& __b)
| ^~~~
/usr/include/c++/10/bits/move.h:189:5: note: 'std::swap'
In file included from /usr/include/c++/10/exception:147,
from /usr/include/c++/10/ios:39,
from /usr/include/c++/10/istream:38,
from /usr/include/c++/10/sstream:38,
from /usr/include/c++/10/complex:45,
from /usr/include/c++/10/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
from game.cpp:2:
/usr/include/c++/10/bits/exception_ptr.h:169:5: note: 'std::__exception_ptr::swap'
169 | swap(exception_ptr& __lhs, exception_ptr& __rhs)
| ^~~~
In file included from /usr/include/c++/10/filesystem:45,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:129,
from game.cpp:2:
/usr/include/c++/10/bits/fs_path.h:658:15: note: 'std::filesystem::__cxx11::swap'
658 | inline void swap(path& __lhs, path& __rhs) noexcept { __lhs.swap(__rhs); }
| ^~~~