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View Compilation Error

0_0_38401875_22916.cpp: In function 'int main()':
0_0_38401875_22916.cpp:32:18: error: no match for 'operator<' (operand types are 'std::basic_ostream<char>' and '<unresolved overloaded function type>')
         cout<<ans<endl;
                  ^
0_0_38401875_22916.cpp:32:18: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:64:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_pair.h:220:5: 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)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_pair.h:220:5: note:   template argument deduction/substitution failed:
0_0_38401875_22916.cpp:32:19: note:   'std::basic_ostream<char>' is not derived from 'const std::pair<_T1, _T2>'
         cout<<ans<endl;
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:67:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:298:5: note: template<class _Iterator> bool std::operator<(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator<(const reverse_iterator<_Iterator>& __x,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:298:5: note:   template argument deduction/substitution failed:
0_0_38401875_22916.cpp:32:19: note:   'std::basic_ostream<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
         cout<<ans<endl;
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:67:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:348:5: 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,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:348:5: note:   template argument deduction/substitution failed:
0_0_38401875_22916.cpp:32:19: note:   'std::basic_ostream<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
         cout<<ans<endl;
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:67:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:1072:5: 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,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:1072:5: note:   template argument deduction/substitution failed:
0_0_38401875_22916.cpp:32:19: note:   'std::basic_ostream<char>' is not derived from 'const std::move_iterator<_Iterator>'
         cout<<ans<endl;
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:67:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:1078:5: note: template<class _Iterator> bool std::operator<(const std::move_iterator<_Iterator>&, const std::move_iterator<_Iterator>&)
     operator<(const move_iterator<_Iterator>& __x,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator.h:1078:5: note:   template argument deduction/substitution failed:
0_0_38401875_22916.cpp:32:19: note:   'std::basic_ostream<char>' is not derived from 'const std::move_iterator<_Iterator>'
         cout<<ans<endl;
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2588:5: 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,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2588:5: note:   template argument deduction/substitution failed:
0_0_38401875_22916.cpp:32:19: note:   'std::basic_ostream<char>' is not derived from 'const std::basic_string<_CharT, _Traits, _Alloc>'
         cout<<ans<endl;
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38401875_22916.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2600:5: note: template<class _CharT, class _Traits, 


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