gap.cpp: In function 'void func(long long int, long long int)':
gap.cpp:32:22: error: no matching function for call to 'max(long long int&, int)'
         ans=max(ans,1);
                      ^
In file included from /usr/include/c++/5/bits/char_traits.h:39:0,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from gap.cpp:1:
/usr/include/c++/5/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++/5/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
gap.cpp:32:22: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
         ans=max(ans,1);
                      ^
In file included from /usr/include/c++/5/bits/char_traits.h:39:0,
                 from /usr/include/c++/5/ios:40,
                 from /usr/include/c++/5/istream:38,
                 from /usr/include/c++/5/sstream:38,
                 from /usr/include/c++/5/complex:45,
                 from /usr/include/c++/5/ccomplex:38,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52,
                 from gap.cpp:1:
/usr/include/c++/5/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++/5/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
gap.cpp:32:22: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
         ans=max(ans,1);
                      ^
In file included from /usr/include/c++/5/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:64,
                 from gap.cpp:1:
/usr/include/c++/5/bits/stl_algo.h:3457:5: note: candidate: template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)
     max(initializer_list<_Tp> __l)
     ^
/usr/include/c++/5/bits/stl_algo.h:3457:5: note:   template argument deduction/substitution failed:
gap.cpp:32:22: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
         ans=max(ans,1);
                      ^
In file included from /usr/include/c++/5/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:64,
                 from gap.cpp:1:
/usr/include/c++/5/bits/stl_algo.h:3463:5: note: candidate: template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^
/usr/include/c++/5/bits/stl_algo.h:3463:5: note:   template argument deduction/substitution failed:
gap.cpp:32:22: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
         ans=max(ans,1);
                      ^