Rezumat problemă

Detalii

Problema	MergeSort	Operații I/O	tastatură/ecran
Limita timp	0.3 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#54292357	Utilizator	berariu ana (anaberariu)
Fișier	mergesort.cpp	Dimensiune	263 B
Data încărcării	25 Noiembrie 2024, 08:24	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

mergesort.cpp: In function 'int main()':
mergesort.cpp:6:8: error: no match for 'operator>' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'int')
     cin> n;

        ^
mergesort.cpp:6:8: note: candidates are:
In file included from /usr/include/c++/4.8/bits/stl_algobase.h:64:0,
                 from /usr/include/c++/4.8/bits/char_traits.h:39,
                 from /usr/include/c++/4.8/ios:40,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_pair.h:233:5: note: template<class _T1, class _T2> constexpr bool std::operator>(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^
/usr/include/c++/4.8/bits/stl_pair.h:233:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::pair<_T1, _T2>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8/bits/char_traits.h:39,
                 from /usr/include/c++/4.8/ios:40,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_iterator.h:309:5: note: template<class _Iterator> bool std::operator>(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator>(const reverse_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8/bits/stl_iterator.h:309:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::reverse_iterator<_Iterator>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8/bits/char_traits.h:39,
                 from /usr/include/c++/4.8/ios:40,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_iterator.h:359:5: note: template<class _IteratorL, class _IteratorR> bool std::operator>(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator>(const reverse_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8/bits/stl_iterator.h:359:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::reverse_iterator<_Iterator>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8/bits/char_traits.h:39,
                 from /usr/include/c++/4.8/ios:40,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_iterator.h:1079:5: note: template<class _IteratorL, class _IteratorR> bool std::operator>(const std::move_iterator<_Iterator>&, const std::move_iterator<_IteratorR>&)
     operator>(const move_iterator<_IteratorL>& __x,
     ^
/usr/include/c++/4.8/bits/stl_iterator.h:1079:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::move_iterator<_Iterator>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/4.8/bits/char_traits.h:39,
                 from /usr/include/c++/4.8/ios:40,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_iterator.h:1085:5: note: template<class _Iterator> bool std::operator>(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&)
     operator>(const move_iterator<_Iterator>& __x,
     ^
/usr/include/c++/4.8/bits/stl_iterator.h:1085:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::move_iterator<_Iterator>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/string:52:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/basic_string.h:2606:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const std::basic_string<_CharT, _Traits, _Alloc>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8/bits/basic_string.h:2606:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/string:52:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/basic_string.h:2618:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const std::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/4.8/bits/basic_string.h:2618:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/string:52:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/istream:38,
                 from /usr/include/c++/4.8/sstream:38,
                 from /usr/include/c++/4.8/complex:45,
                 from /usr/include/c++/4.8/ccomplex:38,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/basic_string.h:2630:5: note: template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const _CharT*, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator>(const _CharT* __lhs,
     ^
/usr/include/c++/4.8/bits/basic_string.h:2630:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   mismatched types 'const _CharT*' and 'std::basic_istream<char>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/vector:64:0,
                 from /usr/include/c++/4.8/bits/random.h:34,
                 from /usr/include/c++/4.8/random:50,
                 from /usr/include/c++/4.8/bits/stl_algo.h:65,
                 from /usr/include/c++/4.8/algorithm:62,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:64,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_vector.h:1434:5: note: template<class _Tp, class _Alloc> bool std::operator>(const std::vector<_Tp, _Alloc>&, const std::vector<_Tp, _Alloc>&)
     operator>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
     ^
/usr/include/c++/4.8/bits/stl_vector.h:1434:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::vector<_Tp, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/tuple:39:0,
                 from /usr/include/c++/4.8/functional:55,
                 from /usr/include/c++/4.8/bits/stl_algo.h:66,
                 from /usr/include/c++/4.8/algorithm:62,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:64,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/array:246:5: note: template<class _Tp, unsigned int _Nm> bool std::operator>(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)
     operator>(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
     ^
/usr/include/c++/4.8/array:246:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::array<_Tp, _Nm>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/functional:55:0,
                 from /usr/include/c++/4.8/bits/stl_algo.h:66,
                 from /usr/include/c++/4.8/algorithm:62,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:64,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/tuple:841:5: note: template<class ... _TElements, class ... _UElements> constexpr bool std::operator>(const std::tuple<_Elements ...>&, const std::tuple<_Elements ...>&)
     operator>(const tuple<_TElements...>& __t,
     ^
/usr/include/c++/4.8/tuple:841:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::tuple<_Elements ...>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/deque:64:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:67,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_deque.h:288:5: note: template<class _Tp, class _Ref, class _Ptr> bool std::operator>(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _Ref, _Ptr>&)
     operator>(const _Deque_iterator<_Tp, _Ref, _Ptr>& __x,
     ^
/usr/include/c++/4.8/bits/stl_deque.h:288:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/deque:64:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:67,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_deque.h:295:5: note: template<class _Tp, class _RefL, class _PtrL, class _RefR, class _PtrR> bool std::operator>(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _RefR, _PtrR>&)
     operator>(const _Deque_iterator<_Tp, _RefL, _PtrL>& __x,
     ^
/usr/include/c++/4.8/bits/stl_deque.h:295:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/deque:64:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:67,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_deque.h:1990:5: note: template<class _Tp, class _Alloc> bool std::operator>(const std::deque<_Tp, _Alloc>&, const std::deque<_Tp, _Alloc>&)
     operator>(const deque<_Tp, _Alloc>& __x,
     ^
/usr/include/c++/4.8/bits/stl_deque.h:1990:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::deque<_Tp, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/list:63:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:78,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_list.h:1644:5: note: template<class _Tp, class _Alloc> bool std::operator>(const std::list<_Tp, _Alloc>&, const std::list<_Tp, _Alloc>&)
     operator>(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
     ^
/usr/include/c++/4.8/bits/stl_list.h:1644:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::list<_Tp, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/map:60:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:80,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_tree.h:934:5: note: template<class _Key, class _Val, class _KeyOfValue, class _Compare, class _Alloc> bool std::operator>(const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>&, const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>&)
     operator>(const _Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8/bits/stl_tree.h:934:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/map:61:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:80,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_map.h:993:5: note: template<class _Key, class _Tp, class _Compare, class _Alloc> bool std::operator>(const std::map<_Key, _Tp, _Compare, _Alloc>&, const std::map<_Key, _Tp, _Compare, _Alloc>&)
     operator>(const map<_Key, _Tp, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8/bits/stl_map.h:993:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::map<_Key, _Tp, _Compare, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/map:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:80,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_multimap.h:895:5: note: template<class _Key, class _Tp, class _Compare, class _Alloc> bool std::operator>(const std::multimap<_Key, _Tp, _Compare, _Alloc>&, const std::multimap<_Key, _Tp, _Compare, _Alloc>&)
     operator>(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8/bits/stl_multimap.h:895:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::multimap<_Key, _Tp, _Compare, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/memory:81:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/unique_ptr.h:564:5: note: template<class _Tp, class _Dp, class _Up, class _Ep> bool std::operator>(const std::unique_ptr<_Tp, _Dp>&, const std::unique_ptr<_Up, _Ep>&)
     operator>(const unique_ptr<_Tp, _Dp>& __x,
     ^
/usr/include/c++/4.8/bits/unique_ptr.h:564:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/memory:81:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/unique_ptr.h:570:5: note: template<class _Tp, class _Dp> bool std::operator>(const std::unique_ptr<_Tp, _Dp>&, std::nullptr_t)
     operator>(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
     ^
/usr/include/c++/4.8/bits/unique_ptr.h:570:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::unique_ptr<_Tp, _Dp>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/memory:81:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/unique_ptr.h:576:5: note: template<class _Tp, class _Dp> bool std::operator>(std::nullptr_t, const std::unique_ptr<_Tp, _Dp>&)
     operator>(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
     ^
/usr/include/c++/4.8/bits/unique_ptr.h:576:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   cannot convert 'std::cin' (type 'std::istream {aka std::basic_istream<char>}') to type 'std::nullptr_t'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8/memory:82,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/shared_ptr_base.h:1096:5: note: template<class _Tp1, class _Tp2, __gnu_cxx::_Lock_policy _Lp> bool std::operator>(const std::__shared_ptr<_Tp1, _Lp>&, const std::__shared_ptr<_Tp2, _Lp>&)
     operator>(const __shared_ptr<_Tp1, _Lp>& __a,
     ^
/usr/include/c++/4.8/bits/shared_ptr_base.h:1096:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::__shared_ptr<_Tp1, _Lp>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8/memory:82,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/shared_ptr_base.h:1102:5: note: template<class _Tp, __gnu_cxx::_Lock_policy _Lp> bool std::operator>(const std::__shared_ptr<_Tp, _Lp>&, std::nullptr_t)
     operator>(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
     ^
/usr/include/c++/4.8/bits/shared_ptr_base.h:1102:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::__shared_ptr<_Tp, _Lp>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/bits/shared_ptr.h:52:0,
                 from /usr/include/c++/4.8/memory:82,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/shared_ptr_base.h:1107:5: note: template<class _Tp, __gnu_cxx::_Lock_policy _Lp> bool std::operator>(std::nullptr_t, const std::__shared_ptr<_Tp, _Lp>&)
     operator>(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
     ^
/usr/include/c++/4.8/bits/shared_ptr_base.h:1107:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   cannot convert 'std::cin' (type 'std::istream {aka std::basic_istream<char>}') to type 'std::nullptr_t'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/memory:82:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/shared_ptr.h:394:5: note: template<class _Tp1, class _Tp2> bool std::operator>(const std::shared_ptr<_Tp1>&, const std::shared_ptr<_Tp2>&)
     operator>(const shared_ptr<_Tp1>& __a,
     ^
/usr/include/c++/4.8/bits/shared_ptr.h:394:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::shared_ptr<_Tp1>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/memory:82:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/shared_ptr.h:400:5: note: template<class _Tp> bool std::operator>(const std::shared_ptr<_Tp1>&, std::nullptr_t)
     operator>(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
     ^
/usr/include/c++/4.8/bits/shared_ptr.h:400:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::shared_ptr<_Tp1>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/memory:82:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:81,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/shared_ptr.h:405:5: note: template<class _Tp> bool std::operator>(std::nullptr_t, const std::shared_ptr<_Tp1>&)
     operator>(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
     ^
/usr/include/c++/4.8/bits/shared_ptr.h:405:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   cannot convert 'std::cin' (type 'std::istream {aka std::basic_istream<char>}') to type 'std::nullptr_t'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/queue:64:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:85,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_queue.h:298:5: note: template<class _Tp, class _Seq> bool std::operator>(const std::queue<_Tp, _Seq>&, const std::queue<_Tp, _Seq>&)
     operator>(const queue<_Tp, _Seq>& __x, const queue<_Tp, _Seq>& __y)
     ^
/usr/include/c++/4.8/bits/stl_queue.h:298:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::queue<_Tp, _Seq>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/set:61:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:86,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_set.h:785:5: note: template<class _Key, class _Compare, class _Alloc> bool std::operator>(const std::set<_Key, _Compare, _Alloc>&, const std::set<_Key, _Compare, _Alloc>&)
     operator>(const set<_Key, _Compare, _Alloc>& __x,
     ^
/usr/include/c++/4.8/bits/stl_set.h:785:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::set<_Key, _Compare, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/set:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:86,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_multiset.h:770:5: note: template<class _Key, class _Compare, class _Alloc> bool std::operator>(const std::multiset<_Key, _Compare, _Alloc>&, const std::multiset<_Key, _Compare, _Alloc>&)
     operator>(const multiset<_Key,_Compare,_Alloc>& __x,
     ^
/usr/include/c++/4.8/bits/stl_multiset.h:770:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::multiset<_Key, _Compare, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/stack:61:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:88,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/stl_stack.h:273:5: note: template<class _Tp, class _Seq> bool std::operator>(const std::stack<_Tp, _Seq>&, const std::stack<_Tp, _Seq>&)
     operator>(const stack<_Tp, _Seq>& __x, const stack<_Tp, _Seq>& __y)
     ^
/usr/include/c++/4.8/bits/stl_stack.h:273:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::stack<_Tp, _Seq>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/valarray:587:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__greater, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
     ^
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/valarray:587:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
     ^
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/valarray:587:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
     ^
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/valarray:587:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
     ^
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/valarray:587:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note: template<class _Dom> std::_Expr<std::_BinClos<std::__greater, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__greater, typename _Dom1::value_type>::result_type> std::operator>(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(>, __greater)
     ^
/usr/include/c++/4.8/bits/valarray_after.h:417:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::valarray<typename _Dom::value_type>'
     cin> n;

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94:0,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/valarray:1182:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__greater, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__greater, _Tp>::result_type> std::operator>(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(>, __greater)
 ^
/usr/include/c++/4.8/valarray:1182:1: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::valarray<_Tp>'
     cin> n;

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94:0,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/valarray:1182:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__greater, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__greater, _Tp>::result_type> std::operator>(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(>, __greater)
 ^
/usr/include/c++/4.8/valarray:1182:1: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::valarray<_Tp>'
     cin> n;

          ^
In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94:0,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/valarray:1182:1: note: template<class _Tp> std::_Expr<std::_BinClos<std::__greater, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__greater, _Tp>::result_type> std::operator>(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(>, __greater)
 ^
/usr/include/c++/4.8/valarray:1182:1: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/forward_list:38:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:102,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/forward_list.h:1374:5: note: template<class _Tp, class _Alloc> bool std::operator>(const std::forward_list<_Tp, _Alloc>&, const std::forward_list<_Tp, _Alloc>&)
     operator>(const forward_list<_Tp, _Alloc>& __lx,
     ^
/usr/include/c++/4.8/bits/forward_list.h:1374:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::forward_list<_Tp, _Alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/future:40:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:103,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/thread:212:3: note: bool std::operator>(std::thread::id, std::thread::id)
   operator>(thread::id __x, thread::id __y) noexcept
   ^
/usr/include/c++/4.8/thread:212:3: note:   no known conversion for argument 1 from 'std::istream {aka std::basic_istream<char>}' to 'std::thread::id'
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:912:5: note: template<class _BiIter> bool std::operator>(const std::sub_match<_BiIter>&, const std::sub_match<_BiIter>&)
     operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
     ^
/usr/include/c++/4.8/bits/regex.h:912:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::sub_match<_BiIter>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:967:5: note: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::operator>(std::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const std::sub_match<_BiIter>&)
     operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
     ^
/usr/include/c++/4.8/bits/regex.h:967:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:1041:5: note: template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::operator>(const std::sub_match<_BiIter>&, std::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)
     operator>(const sub_match<_Bi_iter>& __lhs,
     ^
/usr/include/c++/4.8/bits/regex.h:1041:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::sub_match<_BiIter>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:1115:5: note: template<class _Bi_iter> bool std::operator>(const typename std::iterator_traits<_Iter>::value_type*, const std::sub_match<_BiIter>&)
     operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
     ^
/usr/include/c++/4.8/bits/regex.h:1115:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   mismatched types 'const typename std::iterator_traits<_Iter>::value_type*' and 'std::basic_istream<char>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:1189:5: note: template<class _Bi_iter> bool std::operator>(const std::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)
     operator>(const sub_match<_Bi_iter>& __lhs,
     ^
/usr/include/c++/4.8/bits/regex.h:1189:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::sub_match<_BiIter>'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:1269:5: note: template<class _Bi_iter> bool std::operator>(const typename std::iterator_traits<_Iter>::value_type&, const std::sub_match<_BiIter>&)
     operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
     ^
/usr/include/c++/4.8/bits/regex.h:1269:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   mismatched types 'const std::sub_match<_BiIter>' and 'int'
     cin> n;

          ^
In file included from /usr/include/c++/4.8/regex:62:0,
                 from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:108,
                 from mergesort.cpp:1:
/usr/include/c++/4.8/bits/regex.h:1349:5: note: template<class _Bi_iter> bool std::operator>(const std::sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)
     operator>(const sub_match<_Bi_iter>& __lhs,
     ^
/usr/include/c++/4.8/bits/regex.h:1349:5: note:   template argument deduction/substitution failed:
mergesort.cpp:6:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::sub_match<_BiIter>'
     cin> n;

          ^

Cum funcționează evaluarea?