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#include <iostream>
using namespace std;
 
int main() {
  int x = 1;
  long long y = 1;
  cout << max(x, y) << endl;
}

prog.cpp: In function ‘int main()’:
prog.cpp:7:19: error: no matching function for call to ‘max(int&, long long int&)’
   cout << max(x, y) << endl;
                   ^
In file included from /usr/include/c++/6/bits/char_traits.h:39:0,
                 from /usr/include/c++/6/ios:40,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/6/bits/stl_algobase.h:219:5: note: candidate: template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/6/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   deduced conflicting types for parameter ‘const _Tp’ (‘int’ and ‘long long int’)
   cout << max(x, y) << endl;
                   ^
In file included from /usr/include/c++/6/bits/char_traits.h:39:0,
                 from /usr/include/c++/6/ios:40,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/6/bits/stl_algobase.h:265:5: note: candidate: template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/6/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
prog.cpp:7:19: note:   deduced conflicting types for parameter ‘const _Tp’ (‘int’ and ‘long long int’)
   cout << max(x, y) << endl;
                   ^

Standard output is empty