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View Compilation Error

0_0_14197906_24742.cpp: In function 'int main()':
0_0_14197906_24742.cpp:59:15: error: reference to 'hash' is ambiguous
         CLEAR(hash,-1);
               ^
0_0_14197906_24742.cpp:15:33: note: in definition of macro 'CLEAR'
 #define CLEAR( a , x ) memset ( a , x , sizeof a )
                                 ^
0_0_14197906_24742.cpp:20:15: note: candidates are: int hash [1000010]
 int pre[maxn],hash[1000000+10];
               ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:3068:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_14197906_24742.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_14197906_24742.cpp:59:15: error: reference to 'hash' is ambiguous
         CLEAR(hash,-1);
               ^
0_0_14197906_24742.cpp:15:48: note: in definition of macro 'CLEAR'
 #define CLEAR( a , x ) memset ( a , x , sizeof a )
                                                ^
0_0_14197906_24742.cpp:20:15: note: candidates are: int hash [1000010]
 int pre[maxn],hash[1000000+10];
               ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:3068:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_14197906_24742.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_14197906_24742.cpp:65:20: error: reference to 'hash' is ambiguous
             pre[i]=hash[num[i]];
                    ^
0_0_14197906_24742.cpp:20:15: note: candidates are: int hash [1000010]
 int pre[maxn],hash[1000000+10];
               ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:3068:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_14197906_24742.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_14197906_24742.cpp:66:13: error: reference to 'hash' is ambiguous
             hash[num[i]]=i;
             ^
0_0_14197906_24742.cpp:20:15: note: candidates are: int hash [1000010]
 int pre[maxn],hash[1000000+10];
               ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:3068:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_14197906_24742.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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