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View Compilation Error

0_0_24331752_24663.cpp: In function 'long long int ZL_MST(int, int, int)':
0_0_24331752_24663.cpp:42:10: error: reference to 'hash' is ambiguous
   memset(hash, -1, sizeof(hash));
          ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:42:27: error: reference to 'hash' is ambiguous
   memset(hash, -1, sizeof(hash));
                           ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:49:30: error: reference to 'hash' is ambiguous
    while(vis[v]!=i&&v!=root&&hash[v]==-1)
                              ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:54:16: error: reference to 'hash' is ambiguous
    if(v!=root&&hash[v]==-1)
                ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:58:21: error: reference to 'hash' is ambiguous
                     hash[u]=cnt;
                     ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:60:5: error: reference to 'hash' is ambiguous
     hash[v]=cnt++;
     ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:66:7: error: reference to 'hash' is ambiguous
    if(hash[i]==-1)
       ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:67:17: error: reference to 'hash' is ambiguous
                 hash[i]=cnt++;
                 ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:71:11: error: reference to 'hash' is ambiguous
    E[i].u=hash[E[i].u];
           ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:72:11: error: reference to 'hash' is ambiguous
    E[i].v=hash[E[i].v];
           ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int in[maxn], hash[maxn], vis[maxn], pre[maxn];
               ^
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_24331752_24663.cpp:5:
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_24331752_24663.cpp:77:14: error: reference to 'hash' is ambiguous
         root=hash[root];
              ^
0_0_24331752_24663.cpp:19:15: note: candidates are: int hash [1002]
 int 


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