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View Compilation Error

0_0_20980144_20886.cpp: In function 'void init()':
0_0_20980144_20886.cpp:28:9: error: reference to 'rank' is ambiguous
         rank[i]=0;
         ^
0_0_20980144_20886.cpp:18:15: note: candidates are: int rank [1005]
 int par[MAXN],rank[MAXN];
               ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/stack:60,
                 from 0_0_20980144_20886.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_20980144_20886.cpp: In function 'void Union(int, int)':
0_0_20980144_20886.cpp:46:8: error: reference to 'rank' is ambiguous
     if(rank[x]<rank[y]) {
        ^
0_0_20980144_20886.cpp:18:15: note: candidates are: int rank [1005]
 int par[MAXN],rank[MAXN];
               ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/stack:60,
                 from 0_0_20980144_20886.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_20980144_20886.cpp:46:16: error: reference to 'rank' is ambiguous
     if(rank[x]<rank[y]) {
                ^
0_0_20980144_20886.cpp:18:15: note: candidates are: int rank [1005]
 int par[MAXN],rank[MAXN];
               ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/stack:60,
                 from 0_0_20980144_20886.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_20980144_20886.cpp:50:12: error: reference to 'rank' is ambiguous
         if(rank[x]==rank[y]) rank[x]++;
            ^
0_0_20980144_20886.cpp:18:15: note: candidates are: int rank [1005]
 int par[MAXN],rank[MAXN];
               ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/stack:60,
                 from 0_0_20980144_20886.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_20980144_20886.cpp:50:21: error: reference to 'rank' is ambiguous
         if(rank[x]==rank[y]) rank[x]++;
                     ^
0_0_20980144_20886.cpp:18:15: note: candidates are: int rank [1005]
 int par[MAXN],rank[MAXN];
               ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/stack:60,
                 from 0_0_20980144_20886.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_20980144_20886.cpp:50:30: error: reference to 'rank' is ambiguous
         if(rank[x]==rank[y]) rank[x]++;
                              ^
0_0_20980144_20886.cpp:18:15: note: candidates are: int rank [1005]
 int par[MAXN],rank[MAXN];
               ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/stack:60,
                 from 0_0_20980144_20886.cpp:6:
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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