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View Compilation Error

0_0_21268376_13199.cpp: In function 'void initSet(int)':
0_0_21268376_13199.cpp:13:17: error: reference to 'rank' is ambiguous
         f[i]=i, rank[i]=0;   
                 ^
0_0_21268376_13199.cpp:7:14: note: candidates are: int rank [10005]
 int n,m,f[N],rank[N],X[2*N],Y[2*N],son[N],t;  
              ^
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++/vector:60,
                 from 0_0_21268376_13199.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_21268376_13199.cpp: In function 'bool Union(int, int)':
0_0_21268376_13199.cpp:31:8: error: reference to 'rank' is ambiguous
     if(rank[a]>rank[b])  
        ^
0_0_21268376_13199.cpp:7:14: note: candidates are: int rank [10005]
 int n,m,f[N],rank[N],X[2*N],Y[2*N],son[N],t;  
              ^
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++/vector:60,
                 from 0_0_21268376_13199.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_21268376_13199.cpp:31:16: error: reference to 'rank' is ambiguous
     if(rank[a]>rank[b])  
                ^
0_0_21268376_13199.cpp:7:14: note: candidates are: int rank [10005]
 int n,m,f[N],rank[N],X[2*N],Y[2*N],son[N],t;  
              ^
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++/vector:60,
                 from 0_0_21268376_13199.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_21268376_13199.cpp:34:12: error: reference to 'rank' is ambiguous
         if(rank[a]==rank[b])  
            ^
0_0_21268376_13199.cpp:7:14: note: candidates are: int rank [10005]
 int n,m,f[N],rank[N],X[2*N],Y[2*N],son[N],t;  
              ^
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++/vector:60,
                 from 0_0_21268376_13199.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_21268376_13199.cpp:34:21: error: reference to 'rank' is ambiguous
         if(rank[a]==rank[b])  
                     ^
0_0_21268376_13199.cpp:7:14: note: candidates are: int rank [10005]
 int n,m,f[N],rank[N],X[2*N],Y[2*N],son[N],t;  
              ^
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++/vector:60,
                 from 0_0_21268376_13199.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_21268376_13199.cpp:35:15: error: reference to 'rank' is ambiguous
             ++rank[b];  
               ^
0_0_21268376_13199.cpp:7:14: note: candidates are: int rank [10005]
 int n,m,f[N],rank[N],X[2*N],Y[2*N],son[N],t;  
              ^
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++/vector:60,
                 from 0_0_21268376_13199.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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