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Compilation time: 0.34 sec, absolute service time: 0,5 sec 
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Error(s):
source_file.cpp: In function ‘int main()’:
source_file.cpp:7:7: error: no match for ‘operator>’ (operand types are ‘std::istream {aka std::basic_istream<char>}’ and ‘int’)
    cin>num;
       ^
source_file.cpp:7:7: note: candidate: operator>(int, int) <built-in>
source_file.cpp:7:7: note:   no known conversion for argument 1 from ‘std::istream {aka std::basic_istream<char>}’ to ‘int’
In file included from /usr/include/c++/5/bits/stl_algobase.h:64:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/stl_pair.h:233:5: note: candidate: 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++/5/bits/stl_pair.h:233:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::pair<_T1, _T2>’
    cin>num;
        ^
In file included from /usr/include/c++/5/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/stl_iterator.h:310:5: note: candidate: 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++/5/bits/stl_iterator.h:310:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::reverse_iterator<_Iterator>’
    cin>num;
        ^
In file included from /usr/include/c++/5/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/stl_iterator.h:360:5: note: candidate: 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++/5/bits/stl_iterator.h:360:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::reverse_iterator<_Iterator>’
    cin>num;
        ^
In file included from /usr/include/c++/5/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/stl_iterator.h:1113:5: note: candidate: 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++/5/bits/stl_iterator.h:1113:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::move_iterator<_Iterator>’
    cin>num;
        ^
In file included from /usr/include/c++/5/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/5/bits/char_traits.h:39,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/stl_iterator.h:1119:5: note: candidate: 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++/5/bits/stl_iterator.h:1119:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::move_iterator<_Iterator>’
    cin>num;
        ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/basic_string.h:5024:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:5024:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’
    cin>num;
        ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/basic_string.h:5036:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:5036:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   ‘std::istream {aka std::basic_istream<char>}’ is not derived from ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’
    cin>num;
        ^
In file included from /usr/include/c++/5/string:52:0,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from source_file.cpp:1:
/usr/include/c++/5/bits/basic_string.h:5048:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator>(const _CharT* __lhs,
     ^
/usr/include/c++/5/bits/basic_string.h:5048:5: note:   template argument deduction/substitution failed:
source_file.cpp:7:8: note:   mismatched types ‘const _CharT*’ and ‘std::basic_istream<char>’
    cin>num;
        ^
source_file.cpp:8:11: error: expected ‘)’ before ‘;’ token
 if(int i=0;i<=num; i++)
           ^
source_file.cpp:8:8: warning: unused variable ‘i’ [-Wunused-variable]
 if(int i=0;i<=num; i++)
        ^
source_file.cpp:8:12: error: ‘i’ was not declared in this scope
 if(int i=0;i<=num; i++)
            ^
source_file.cpp:15:1: error: ‘else’ without a previous ‘if’
 else 
 ^
source_file.cpp:17:1: error: expected ‘;’ before ‘}’ token
 }
 ^
source_file.cpp: At global scope:
source_file.cpp:18:2: error: expected unqualified-id before ‘return’
  return 0;
  ^
source_file.cpp:20:1: error: expected declaration before ‘}’ token
 }
 ^