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View Compilation Error

0_0_22252998_12870.cpp: In function 'int BFS(int, int)':
0_0_22252998_12870.cpp:27:10: error: reference to 'hash' is ambiguous
  memset( hash, 0, sizeof( hash ) );
          ^
0_0_22252998_12870.cpp:7:19: note: candidates are: char hash [25][25]
 char map[25][25], hash[25][25];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_22252998_12870.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_22252998_12870.cpp:27:27: error: reference to 'hash' is ambiguous
  memset( hash, 0, sizeof( hash ) );
                           ^
0_0_22252998_12870.cpp:7:19: note: candidates are: char hash [25][25]
 char map[25][25], hash[25][25];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_22252998_12870.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_22252998_12870.cpp:30:2: error: reference to 'hash' is ambiguous
  hash[sx][sy]= 1;
  ^
0_0_22252998_12870.cpp:7:19: note: candidates are: char hash [25][25]
 char map[25][25], hash[25][25];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_22252998_12870.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_22252998_12870.cpp:43:25: error: reference to 'hash' is ambiguous
    if( legal( x, y )&& !hash[x][y]  )
                         ^
0_0_22252998_12870.cpp:7:19: note: candidates are: char hash [25][25]
 char map[25][25], hash[25][25];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_22252998_12870.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_22252998_12870.cpp:46:5: error: reference to 'hash' is ambiguous
     hash[x][y]= 1;
     ^
0_0_22252998_12870.cpp:7:19: note: candidates are: char hash [25][25]
 char map[25][25], hash[25][25];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_22252998_12870.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^


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