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View Compilation Error

0_0_13147259_9376.cpp: In function 'void lcs(int, int)':
0_0_13147259_9376.cpp:24:28: error: reference to 'hash' is ambiguous
       if(s1[i-1]==s2[j-1]||hash[s1[i-1]-'a'][s2[j-1]-'a'])dp[i][j]=dp[i-1][j-1]+1;
                            ^
0_0_13147259_9376.cpp:17:45: note: candidates are: int hash [30][30]
 int dp[1010][1010],pos[1010],pos1[1010],k=0,hash[30][30];
                                             ^
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_13147259_9376.cpp:10:
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_13147259_9376.cpp: In function 'int main()':
0_0_13147259_9376.cpp:47:14: error: reference to 'hash' is ambiguous
       memset(hash,0,sizeof hash);
              ^
0_0_13147259_9376.cpp:17:45: note: candidates are: int hash [30][30]
 int dp[1010][1010],pos[1010],pos1[1010],k=0,hash[30][30];
                                             ^
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_13147259_9376.cpp:10:
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_13147259_9376.cpp:47:28: error: reference to 'hash' is ambiguous
       memset(hash,0,sizeof hash);
                            ^
0_0_13147259_9376.cpp:17:45: note: candidates are: int hash [30][30]
 int dp[1010][1010],pos[1010],pos1[1010],k=0,hash[30][30];
                                             ^
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_13147259_9376.cpp:10:
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_13147259_9376.cpp:53:9: error: reference to 'hash' is ambiguous
         hash[y-'a'][x-'a']=1;
         ^
0_0_13147259_9376.cpp:17:45: note: candidates are: int hash [30][30]
 int dp[1010][1010],pos[1010],pos1[1010],k=0,hash[30][30];
                                             ^
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_13147259_9376.cpp:10:
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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