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View Compilation Error

0_0_37825129_19923.cpp: In function 'void dijkstra()':
0_0_37825129_19923.cpp:77:45: error: wrong number of template arguments (0, should be 1)
     priority_queue<PII,vector<PII>,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++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_37825129_19923.cpp:1:
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_37825129_19923.cpp:77:47: error: template argument 3 is invalid
     priority_queue<PII,vector<PII>,greater< > >q;
                                               ^
0_0_37825129_19923.cpp:77:49: error: invalid type in declaration before ';' token
     priority_queue<PII,vector<PII>,greater< > >q;
                                                 ^
0_0_37825129_19923.cpp:81:7: error: request for member 'push' in 'q', which is of non-class type 'int'
     q.push({0,s});
       ^
0_0_37825129_19923.cpp:82:15: error: request for member 'empty' in 'q', which is of non-class type 'int'
     while (!q.empty()){
               ^
0_0_37825129_19923.cpp:83:20: error: request for member 'top' in 'q', which is of non-class type 'int'
         int tp = q.top().se;q.pop();
                    ^
0_0_37825129_19923.cpp:83:31: error: request for member 'pop' in 'q', which is of non-class type 'int'
         int tp = q.top().se;q.pop();
                               ^
0_0_37825129_19923.cpp:93:19: error: request for member 'push' in 'q', which is of non-class type 'int'
                 q.push({dist[x],x});
                   ^


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