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View Compilation Error

0_0_13727129_8521.cpp: In function 'void init(int)':
0_0_13727129_8521.cpp:22:16: error: reference to 'rank' is ambiguous
         f[i]=i,rank[i]=1;
                ^
0_0_13727129_8521.cpp:7:11: note: candidates are: int rank [10010]
 int f[N], rank[N], n1, m1, n2, m2, pos1, pos2, isCircle[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_13727129_8521.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_13727129_8521.cpp: In function 'void Union(int, int)':
0_0_13727129_8521.cpp:36:5: error: reference to 'rank' is ambiguous
     rank[a] += rank[b];
     ^
0_0_13727129_8521.cpp:7:11: note: candidates are: int rank [10010]
 int f[N], rank[N], n1, m1, n2, m2, pos1, pos2, isCircle[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_13727129_8521.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_13727129_8521.cpp:36:16: error: reference to 'rank' is ambiguous
     rank[a] += rank[b];
                ^
0_0_13727129_8521.cpp:7:11: note: candidates are: int rank [10010]
 int f[N], rank[N], n1, m1, n2, m2, pos1, pos2, isCircle[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_13727129_8521.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_13727129_8521.cpp: In function 'int main()':
0_0_13727129_8521.cpp:70:30: error: reference to 'rank' is ambiguous
             arr1[pos1].num = rank[i];
                              ^
0_0_13727129_8521.cpp:7:11: note: candidates are: int rank [10010]
 int f[N], rank[N], n1, m1, n2, m2, pos1, pos2, isCircle[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_13727129_8521.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_13727129_8521.cpp:82:30: error: reference to 'rank' is ambiguous
             arr2[pos2].num = rank[i];
                              ^
0_0_13727129_8521.cpp:7:11: note: candidates are: int rank [10010]
 int f[N], rank[N], n1, m1, n2, m2, pos1, pos2, isCircle[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_13727129_8521.cpp:2:
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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