game.cpp: In function 'int hasEdge(int, int)':
game.cpp:11:16: error: 'swap' was not declared in this scope
11 | if (u > v) swap(u, v);
| ^~~~
game.cpp:11:16: 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/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/bits/nested_exception.h:40,
from /usr/include/c++/10/exception:148,
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/move.h:189:5: note: 'std::swap'
189 | swap(_Tp& __a, _Tp& __b)
| ^~~~
game.cpp:12:15: error: 'i' was not declared in this scope
12 | if (++niz[i] >= n - i) return 1;
| ^
game.cpp:12:21: error: 'n' was not declared in this scope
12 | if (++niz[i] >= n - i) return 1;
| ^