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View Compilation Error

0_0_15958381_7362.cpp: In function 'void dfs(int, int, int)':
0_0_15958381_7362.cpp:52:13: error: reference to 'rank' is ambiguous
             rank[x] = rank[j]+1;  
             ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:52:23: error: reference to 'rank' is ambiguous
             rank[x] = rank[j]+1;  
                       ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:56:28: error: reference to 'rank' is ambiguous
             path_size[v] = rank[j];  
                            ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:63:9: error: reference to 'rank' is ambiguous
         rank[x] = 1;  
         ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp: In function 'void init()':
0_0_15958381_7362.cpp:156:28: error: reference to 'rank' is ambiguous
     path_size[belong[1]] = rank[1];  
                            ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp: In function 'int Q(int, int, int)':
0_0_15958381_7362.cpp:170:34: error: reference to 'rank' is ambiguous
             tmp = query(tree[x], rank[a], path_size[x], c, 0, Max, Min);  
                                  ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:185:34: error: reference to 'rank' is ambiguous
             tmp = query(tree[y], rank[b], path_size[y], c, 1, Max, Min);  
                                  ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:200:8: error: reference to 'rank' is ambiguous
     if(rank[a]>rank[b]){  
        ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:200:16: error: reference to 'rank' is ambiguous
     if(rank[a]>rank[b]){  
                ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:201:30: error: reference to 'rank' is ambiguous
         tmp = query(tree[x], rank[b], rank[a], c, 1, Max, Min);  
                              ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:201:39: error: reference to 'rank' is ambiguous
         tmp = query(tree[x], rank[b], rank[a], c, 1, Max, Min);  
                                       ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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_15958381_7362.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_15958381_7362.cpp:204:30: error: reference to 'rank' is ambiguous
         tmp = query(tree[x], rank[a], rank[b], c, 0, Max, Min);  
                              ^
0_0_15958381_7362.cpp:20:5: note: candidates are: int rank [50010]
 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,


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