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View Compilation Error

0_0_16742063_25956.cpp: In function 'void F(int)':
0_0_16742063_25956.cpp:79:3: error: reference to 'rank' is ambiguous
   rank[v]=rank[u];
   ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_16742063_25956.cpp:79:11: error: reference to 'rank' is ambiguous
   rank[v]=rank[u];
           ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_16742063_25956.cpp: In function 'int main()':
0_0_16742063_25956.cpp:123:10: error: reference to 'rank' is ambiguous
   memset(rank,0,sizeof rank);
          ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_16742063_25956.cpp:123:24: error: reference to 'rank' is ambiguous
   memset(rank,0,sizeof rank);
                        ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_16742063_25956.cpp:124:24: error: reference to 'rank' is ambiguous
   for(int i=0;i<3;i++) rank[p[i].u]=i+1;
                        ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_16742063_25956.cpp:140:32: error: reference to 'rank' is ambiguous
     printf("%d\n",ans=min(t,mn[rank[u]][rank[v]]));
                                ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/type_traits:1340:12: note:                 template<class> struct std::rank
     struct rank
            ^
0_0_16742063_25956.cpp:140:41: error: reference to 'rank' is ambiguous
     printf("%d\n",ans=min(t,mn[rank[u]][rank[v]]));
                                         ^
0_0_16742063_25956.cpp:73:5: note: candidates are: int rank [1000005]
 int 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_16742063_25956.cpp:4:
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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