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View Compilation Error

0_0_16969992_7153.cpp: In function 'bool cmp(int, int)':
0_0_16969992_7153.cpp:16:9: error: reference to 'hash' is ambiguous
  return(hash[a]<hash[b]);
         ^
0_0_16969992_7153.cpp:6:39: note: candidates are: long long unsigned int hash [50000]
 unsigned long long h[50000],xp[50000],hash[50000];
                                       ^
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_16969992_7153.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_16969992_7153.cpp:16:17: error: reference to 'hash' is ambiguous
  return(hash[a]<hash[b]);
                 ^
0_0_16969992_7153.cpp:6:39: note: candidates are: long long unsigned int hash [50000]
 unsigned long long h[50000],xp[50000],hash[50000];
                                       ^
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_16969992_7153.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_16969992_7153.cpp: In function 'bool possible(int)':
0_0_16969992_7153.cpp:24:3: error: reference to 'rank' is ambiguous
   rank[i]=i;
   ^
0_0_16969992_7153.cpp:7:13: note: candidates are: int rank [50000]
 int n,m,pos,rank[50000];
             ^
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_16969992_7153.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_16969992_7153.cpp:25:3: error: reference to 'hash' is ambiguous
   hash[i]=h[i]-h[i+l]*xp[l];
   ^
0_0_16969992_7153.cpp:6:39: note: candidates are: long long unsigned int hash [50000]
 unsigned long long h[50000],xp[50000],hash[50000];
                                       ^
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_16969992_7153.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_16969992_7153.cpp:27:7: error: reference to 'rank' is ambiguous
  sort(rank,rank+n-l+1,cmp);
       ^
0_0_16969992_7153.cpp:7:13: note: candidates are: int rank [50000]
 int n,m,pos,rank[50000];
             ^
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_16969992_7153.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_16969992_7153.cpp:27:12: error: reference to 'rank' is ambiguous
  sort(rank,rank+n-l+1,cmp);
            ^
0_0_16969992_7153.cpp:7:13: note: candidates are: int rank [50000]
 int n,m,pos,rank[50000];
             ^
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_16969992_7153.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_16969992_7153.cpp:30:10: error: reference to 'hash' is ambiguous
   if(!i||hash[rank[i]]!=hash[rank[i-1]])c=0;
          ^
0_0_16969992_7153.cpp:6:39: note: candidates are: long long unsigned int hash [50000]
 unsigned long long h[50000],xp[50000],hash[50000];
                                       ^
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_16969992_7153.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_16969992_7153.cpp:30:15: error: reference to 'rank' is ambiguous
   if(!i||hash[rank[i]]!=hash[rank[i-1]])c=0;
               ^
0_0_16969992_7153.cpp:7:13: note: candidates are: int rank [50000]
 int n,m,pos,rank[50000];
             ^
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_16969992_7153.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_16969992_7153.cpp:30:25: error: reference to 'hash' is ambiguous
   if(!i||hash[rank[i]]!=hash[rank[i-1]])c=0;
                         ^
0_0_16969992_7153.cpp:6:39: note: candidates are: long long unsigned int hash [50000]
 unsigned long long h[50000],xp[50000],hash[50000];
                                       ^
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_16969992_7153.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_16969992_7153.cpp:30:30: error: reference to 'rank' is ambiguous
   if(!i||hash[rank[i]]!=hash[rank[i-1]])c=0;
                              ^
0_0_16969992_7153.cpp:7:13: note: candidates are: int rank [50000]
 int n,m,pos,rank[50000];
             ^
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_16969992_7153.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_16969992_7153.cpp:31:25: error: reference to 'rank' is ambiguous
   if(++c>=m)pos=max(pos,rank[i]);
                         ^
0_0_16969992_7153.cpp:7:13: note: candidates are: int rank [50000]
 int n,m,pos,rank[50000];
             ^
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++/algori


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