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View Compilation Error

0_0_21423792_27032.cpp: In function 'void make_set(int)':
0_0_21423792_27032.cpp:23:3: error: reference to 'rank' is ambiguous
   rank[i] = 0;
   ^
0_0_21423792_27032.cpp:12:14: note: candidates are: int rank [110]
 int fa[maxn],rank[maxn],ans;
              ^
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++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_21423792_27032.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_21423792_27032.cpp: In function 'void union_set(int, int, int)':
0_0_21423792_27032.cpp:40:5: error: reference to 'rank' is ambiguous
  if(rank[x] > rank[y])
     ^
0_0_21423792_27032.cpp:12:14: note: candidates are: int rank [110]
 int fa[maxn],rank[maxn],ans;
              ^
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++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_21423792_27032.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_21423792_27032.cpp:40:15: error: reference to 'rank' is ambiguous
  if(rank[x] > rank[y])
               ^
0_0_21423792_27032.cpp:12:14: note: candidates are: int rank [110]
 int fa[maxn],rank[maxn],ans;
              ^
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++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_21423792_27032.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_21423792_27032.cpp:45:6: error: reference to 'rank' is ambiguous
   if(rank[x] == rank[y])
      ^
0_0_21423792_27032.cpp:12:14: note: candidates are: int rank [110]
 int fa[maxn],rank[maxn],ans;
              ^
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++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_21423792_27032.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_21423792_27032.cpp:45:17: error: reference to 'rank' is ambiguous
   if(rank[x] == rank[y])
                 ^
0_0_21423792_27032.cpp:12:14: note: candidates are: int rank [110]
 int fa[maxn],rank[maxn],ans;
              ^
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++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_21423792_27032.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_21423792_27032.cpp:46:4: error: reference to 'rank' is ambiguous
    rank[y]++;
    ^
0_0_21423792_27032.cpp:12:14: note: candidates are: int rank [110]
 int fa[maxn],rank[maxn],ans;
              ^
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++/utility:70,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:60,
                 from 0_0_21423792_27032.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^


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