View Compilation Error

0_0_38500238_30882.cpp: In function 'int main()':
0_0_38500238_30882.cpp:120:10: error: reference to 'is_same' is ambiguous
      if (is_same(i, j, k))
          ^
0_0_38500238_30882.cpp:58:6: note: candidates are: bool is_same(int, int, int)
 bool is_same(int a, int b, int c)
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/move.h:57:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_pair.h:59,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:64,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_tree.h:61,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/map:60,
                 from 0_0_38500238_30882.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:922:12: note:                 template<class, class> struct std::is_same
     struct is_same;
            ^