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View Compilation Error

0_0_13973745_19925.cpp: In function 'int main()':
0_0_13973745_19925.cpp:51:35: error: reference to 'rank' is ambiguous
                                if(rank[X]>=rank[Y]){
                                   ^
0_0_13973745_19925.cpp:10:23: note: candidates are: int rank [110]
 int n,m,fa[N],a[N][N],rank[N];
                       ^
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_13973745_19925.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_13973745_19925.cpp:51:44: error: reference to 'rank' is ambiguous
                                if(rank[X]>=rank[Y]){
                                            ^
0_0_13973745_19925.cpp:10:23: note: candidates are: int rank [110]
 int n,m,fa[N],a[N][N],rank[N];
                       ^
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_13973745_19925.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_13973745_19925.cpp:53:32: error: reference to 'rank' is ambiguous
                                rank[X]+=rank[Y];
                                ^
0_0_13973745_19925.cpp:10:23: note: candidates are: int rank [110]
 int n,m,fa[N],a[N][N],rank[N];
                       ^
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_13973745_19925.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_13973745_19925.cpp:53:41: error: reference to 'rank' is ambiguous
                                rank[X]+=rank[Y];
                                         ^
0_0_13973745_19925.cpp:10:23: note: candidates are: int rank [110]
 int n,m,fa[N],a[N][N],rank[N];
                       ^
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_13973745_19925.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_13973745_19925.cpp:56:32: error: reference to 'rank' is ambiguous
                                rank[Y]+=rank[X];
                                ^
0_0_13973745_19925.cpp:10:23: note: candidates are: int rank [110]
 int n,m,fa[N],a[N][N],rank[N];
                       ^
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_13973745_19925.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_13973745_19925.cpp:56:41: error: reference to 'rank' is ambiguous
                                rank[Y]+=rank[X];
                                         ^
0_0_13973745_19925.cpp:10:23: note: candidates are: int rank [110]
 int n,m,fa[N],a[N][N],rank[N];
                       ^
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_13973745_19925.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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