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View Compilation Error

0_0_33095281_32454.cpp: In function 'int main()':
0_0_33095281_32454.cpp:31:43: error: wrong number of template arguments (0, should be 1)
   priority_queue<int, vector<int>, greater<>> q;
                                           ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
                 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++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_33095281_32454.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:358:12: error: provided for 'template<class _Tp> struct std::greater'
     struct greater : public binary_function<_Tp, _Tp, bool>
            ^
0_0_33095281_32454.cpp:31:44: error: template argument 3 is invalid
   priority_queue<int, vector<int>, greater<>> q;
                                            ^
0_0_33095281_32454.cpp:31:48: error: invalid type in declaration before ';' token
   priority_queue<int, vector<int>, greater<>> q;
                                                ^
0_0_33095281_32454.cpp:35:7: error: request for member 'push' in 'q', which is of non-class type 'int'
     q.push(i);
       ^
0_0_33095281_32454.cpp:39:13: error: request for member 'empty' in 'q', which is of non-class type 'int'
   while (!q.empty())
             ^
0_0_33095281_32454.cpp:41:14: error: request for member 'top' in 'q', which is of non-class type 'int'
    int u = q.top();
              ^
0_0_33095281_32454.cpp:42:6: error: request for member 'pop' in 'q', which is of non-class type 'int'
    q.pop();
      ^
0_0_33095281_32454.cpp:54:9: error: request for member 'push' in 'q', which is of non-class type 'int'
       q.push(v);
         ^


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