Eroare de compilare: In file included from /usr/include/c++/10/set:62, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:87, from main.cpp:1: /usr/include/c++/10/bits/stl_multiset.h: In instantiation of 'void std::multiset<_Key, _Compare, _Alloc>::insert(_InputIterator, _InputIterator) [with _InputIterator = int; _Key = train; _Compare = std::less<train>; _Alloc = std::allocator<train>]': main.cpp:64:41: required from here /usr/include/c++/10/bits/stl_multiset.h:552:30: error: no matching function for call to 'std::_Rb_tree<train, train, std::_Identity<train>, std::less<train>, std::allocator<train> >::_M_insert_range_equal(int&, int&)' 552 | { _M_t._M_insert_range_equal(__first, __last); } | ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/10/map:60, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:81, from main.cpp:1: /usr/include/c++/10/bits/stl_tree.h:1122:2: note: candidate: 'template<class _InputIterator> std::__enable_if_t<std::is_same<_Val, typename std::iterator_traits<_InputIterator>::value_type>::value> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_range_equal(_InputIterator, _InputIterator) [with _InputIterator = _InputIterator; _Key = train; _Val = train; _KeyOfValue = std::_Identity<train>; _Compare = std::less<train>; _Alloc = std::allocator<train>]' 1122 | _M_insert_range_equal(_InputIterator __first, _InputIterator __last) | ^~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/10/bits/stl_tree.h:1122:2: note: template argument deduction/substitution failed: /usr/include/c++/10/bits/stl_tree.h: In substitution of 'template<class _InputIterator> std::__enable_if_t<std::is_same<train, typename std::iterator_traits< <template-parameter-1-1> >::value_type>::value, void> std::_Rb_tree<train, train, std::_Identity<train>, std::less<train>, std::allocator<train> >::_M_insert_range_equal<_InputIterator>(_InputIterator, _InputIterator) [with _InputIterator = int]': /usr/include/c++/10/bits/stl_multiset.h:552:30: required from 'void std::multiset<_Key, _Compare, _Alloc>::insert(_InputIterator, _InputIterator) [with _InputIterator = int; _Key = train; _Compare = std::less<train>; _Alloc = std::allocator<train>]' main.cpp:64:41: required from here /usr/include/c++/10/bits/stl_tree.h:1122:2: error: no type named 'value_type' in 'struct std::iterator_traits<int>' /usr/include/c++/10/bits/stl_multiset.h: In instantiation of 'void std::multiset<_Key, _Compare, _Alloc>::insert(_InputIterator, _InputIterator) [with _InputIterator = int; _Key = train; _Compare = std::less<train>; _Alloc = std::allocator<train>]': main.cpp:64:41: required from here /usr/include/c++/10/bits/stl_tree.h:1131:2: note: candidate: 'template<class _InputIterator> std::__enable_if_t<(! std::is_same<_Val, typename std::iterator_traits<_InputIterator>::value_type>::value)> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_range_equal(_InputIterator, _InputIterator) [with _InputIterator = _InputIterator; _Key = train; _Val = train; _KeyOfValue = std::_Identity<train>; _Compare = std::less<train>; _Alloc = std::allocator<train>]' 1131 | _M_insert_range_equal(_InputIterator __first, _InputIterator __last) | ^~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/10/bits/stl_tree.h:1131:2: note: template argument deduction/substitution failed: /usr/include/c++/10/bits/stl_tree.h: In substitution of 'template<class _InputIterator> std::__enable_if_t<(! std::is_same<train, typename std::iterator_traits< <template-parameter-1-1> >::value_type>::value), void> std::_Rb_tree<train, train, std::_Identity<train>, std::less<train>, std::allocator<train> >::_M_insert_range_equal<_InputIterator>(_InputIterator, _InputIterator) [with _InputIterator = int]': /usr/include/c++/10/bits/stl_multiset.h:552:30: required from 'void std::multiset<_Key, _Compare, _Alloc>::insert(_InputIterator, _InputIterator) [with _InputIterator = int; _Key = train; _Compare = std::less<train>; _Alloc = std::allocator<train>]' main.cpp:64:41: required from here /usr/include/c++/10/bits/stl_tree.h:1113:52: error: no type named 'value_type' in 'struct std::iterator_traits<int>' 1113 | __enable_if_t<!__same_value_type<_InputIterator>::value> | ^~~~~ Non zero exit status: 1