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View Compilation Error

0_0_21017961_13786.cpp: In function 'int main()':
0_0_21017961_13786.cpp:30:37: error: no matching function for call to 'max(int&, __gnu_cxx::__normal_iterator<const int*, std::vector<int> >::difference_type)'
                 ans = max(ans, r - l);
                                     ^
0_0_21017961_13786.cpp:30:37: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60:0,
                 from 0_0_21017961_13786.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:217:5: note: template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:217:5: note:   template argument deduction/substitution failed:
0_0_21017961_13786.cpp:30:37: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__normal_iterator<const int*, std::vector<int> >::difference_type {aka long long int}')
                 ans = max(ans, r - l);
                                     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60:0,
                 from 0_0_21017961_13786.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:261:5: note: template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:261:5: note:   template argument deduction/substitution failed:
0_0_21017961_13786.cpp:30:37: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__normal_iterator<const int*, std::vector<int> >::difference_type {aka long long int}')
                 ans = max(ans, r - l);
                                     ^
0_0_21017961_13786.cpp:35:33: error: no matching function for call to 'max(int&, __gnu_cxx::__normal_iterator<const int*, std::vector<int> >::difference_type)'
             ans = max(ans, r - l);
                                 ^
0_0_21017961_13786.cpp:35:33: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60:0,
                 from 0_0_21017961_13786.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:217:5: note: template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:217:5: note:   template argument deduction/substitution failed:
0_0_21017961_13786.cpp:35:33: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__normal_iterator<const int*, std::vector<int> >::difference_type {aka long long int}')
             ans = max(ans, r - l);
                                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:60:0,
                 from 0_0_21017961_13786.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:261:5: note: template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:261:5: note:   template argument deduction/substitution failed:
0_0_21017961_13786.cpp:35:33: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__normal_iterator<const int*, std::vector<int> >::difference_type {aka long long int}')
             ans = max(ans, r - l);
                                 ^


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