swaps.cpp: In function 'void solve(int, int)':
swaps.cpp:22:25: error: 'schedule' was not declared in this scope
22 | schedule(j, inc(j,i));
| ^~~~~~~~
swaps.cpp:26:31: error: no matching function for call to 'visit()'
26 | vi ans = visit();
| ~~~~~^~
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:80,
from swaps.cpp:1:
/usr/include/c++/13/variant:1851:5: note: candidate: 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
1851 | visit(_Visitor&& __visitor, _Variants&&... __variants)
| ^~~~~
/usr/include/c++/13/variant:1851:5: note: template argument deduction/substitution failed:
swaps.cpp:26:31: note: candidate expects at least 1 argument, 0 provided
26 | vi ans = visit();
| ~~~~~^~
/usr/include/c++/13/variant:1891:5: note: candidate: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
1891 | visit(_Visitor&& __visitor, _Variants&&... __variants)
| ^~~~~
/usr/include/c++/13/variant:1891:5: note: template argument deduction/substitution failed:
swaps.cpp:26:31: note: candidate expects at least 1 argument, 0 provided
26 | vi ans = visit();
| ~~~~~^~
swaps.cpp:32:25: error: 'schedule' was not declared in this scope
32 | schedule(j, inc(j,i));
| ^~~~~~~~
swaps.cpp:38:25: error: 'schedule' was not declared in this scope
38 | schedule(j, inc(j,i));
| ^~~~~~~~
swaps.cpp:42:32: error: no matching function for call to 'visit()'
42 | vi ans2 = visit();
| ~~~~~^~
/usr/include/c++/13/variant:1851:5: note: candidate: 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
1851 | visit(_Visitor&& __visitor, _Variants&&... __variants)
| ^~~~~
/usr/include/c++/13/variant:1851:5: note: template argument deduction/substitution failed:
swaps.cpp:42:32: note: candidate expects at least 1 argument, 0 provided
42 | vi ans2 = visit();
| ~~~~~^~
/usr/include/c++/13/variant:1891:5: note: candidate: 'template<class _Res, class _Visitor, class ... _Variants> constexpr _Res std::visit(_Visitor&&, _Variants&& ...)'
1891 | visit(_Visitor&& __visitor, _Variants&&... __variants)
| ^~~~~
/usr/include/c++/13/variant:1891:5: note: template argument deduction/substitution failed:
swaps.cpp:42:32: note: candidate expects at least 1 argument, 0 provided
42 | vi ans2 = visit();
| ~~~~~^~
swaps.cpp:49:9: error: 'answer' was not declared in this scope
49 | answer(ans);
| ^~~~~~