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View Compilation Error

0_0_26607961_23890.cpp: In function 'int main()':
0_0_26607961_23890.cpp:102:26: error: reference to 'less' is ambiguous
             if (a[i]==0) less[up2++]=i;
                          ^
0_0_26607961_23890.cpp:11:5: note: candidates are: int less [500]
 int less[500];
     ^
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++/random:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_26607961_23890.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^
0_0_26607961_23890.cpp:112:47: error: reference to 'less' is ambiguous
                     Map[up][k]=-Count(more[i],less[k]);
                                               ^
0_0_26607961_23890.cpp:11:5: note: candidates are: int less [500]
 int less[500];
     ^
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++/random:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_26607961_23890.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^


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