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View Compilation Error

0_0_33744684_1632.cpp: In function 'int main()':
0_0_33744684_1632.cpp:175:29: error: no matching function for call to 'sort(node*, node*, <unresolved overloaded function type>)'
         sort(no+1,no+n+1,cmp);
                             ^
0_0_33744684_1632.cpp:175:29: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_33744684_1632.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4676:5: note: template<class _RAIter> void std::sort(_RAIter, _RAIter)
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4676:5: note:   template argument deduction/substitution failed:
0_0_33744684_1632.cpp:175:29: note:   candidate expects 2 arguments, 3 provided
         sort(no+1,no+n+1,cmp);
                             ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_33744684_1632.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note: template<class _RAIter, class _Compare> void std::sort(_RAIter, _RAIter, _Compare)
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note:   template argument deduction/substitution failed:
0_0_33744684_1632.cpp:175:29: note:   couldn't deduce template parameter '_Compare'
         sort(no+1,no+n+1,cmp);
                             ^
0_0_33744684_1632.cpp:211:45: error: no matching function for call to 'sort(std::vector<node>::iterator, std::vector<node>::iterator, <unresolved overloaded function type>)'
             sort(ans.begin(), ans.end(), cmp);
                                             ^
0_0_33744684_1632.cpp:211:45: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_33744684_1632.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4676:5: note: template<class _RAIter> void std::sort(_RAIter, _RAIter)
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4676:5: note:   template argument deduction/substitution failed:
0_0_33744684_1632.cpp:211:45: note:   candidate expects 2 arguments, 3 provided
             sort(ans.begin(), ans.end(), cmp);
                                             ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_33744684_1632.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note: template<class _RAIter, class _Compare> void std::sort(_RAIter, _RAIter, _Compare)
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note:   template argument deduction/substitution failed:
0_0_33744684_1632.cpp:211:45: note:   couldn't deduce template parameter '_Compare'
             sort(ans.begin(), ans.end(), cmp);
                                             ^


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