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View Compilation Error

0_0_29554870_30602.cpp: In function 'void init()':
0_0_29554870_30602.cpp:24:9: error: reference to 'rank' is ambiguous
         rank[i]=0;
         ^
0_0_29554870_30602.cpp:8:26: note: candidates are: int rank [21111]
 int f[N],n,m,pre[N],s[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_29554870_30602.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_29554870_30602.cpp: In function 'int main()':
0_0_29554870_30602.cpp:63:21: error: reference to 'rank' is ambiguous
                 if (rank[t1] > rank[t2]) f[t2] = t1;
                     ^
0_0_29554870_30602.cpp:8:26: note: candidates are: int rank [21111]
 int f[N],n,m,pre[N],s[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_29554870_30602.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_29554870_30602.cpp:63:32: error: reference to 'rank' is ambiguous
                 if (rank[t1] > rank[t2]) f[t2] = t1;
                                ^
0_0_29554870_30602.cpp:8:26: note: candidates are: int rank [21111]
 int f[N],n,m,pre[N],s[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_29554870_30602.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_29554870_30602.cpp:66:25: error: reference to 'rank' is ambiguous
                     if (rank[t1] == rank[t2]) rank[t2]++;
                         ^
0_0_29554870_30602.cpp:8:26: note: candidates are: int rank [21111]
 int f[N],n,m,pre[N],s[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_29554870_30602.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_29554870_30602.cpp:66:37: error: reference to 'rank' is ambiguous
                     if (rank[t1] == rank[t2]) rank[t2]++;
                                     ^
0_0_29554870_30602.cpp:8:26: note: candidates are: int rank [21111]
 int f[N],n,m,pre[N],s[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_29554870_30602.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_29554870_30602.cpp:66:47: error: reference to 'rank' is ambiguous
                     if (rank[t1] == rank[t2]) rank[t2]++;
                                               ^
0_0_29554870_30602.cpp:8:26: note: candidates are: int rank [21111]
 int f[N],n,m,pre[N],s[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_29554870_30602.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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