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View Compilation Error

0_0_33391817_14098.cpp:91:26: error: macro "mem" passed 3 arguments, but takes just 2
   mem(flag,0,sizeof(flag));
                          ^
0_0_33391817_14098.cpp:92:22: error: macro "mem" passed 3 arguments, but takes just 2
   mem(ch,0,sizeof(ch));
                      ^
0_0_33391817_14098.cpp: In function 'int main()':
0_0_33391817_14098.cpp:91:3: error: 'mem' was not declared in this scope
   mem(flag,0,sizeof(flag));
   ^
0_0_33391817_14098.cpp:100:21: error: no matching function for call to 'find(char [1000010])'
   int ans = find(str);
                     ^
0_0_33391817_14098.cpp:100:21: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_facets.h:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_ios.h:37,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:44,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_33391817_14098.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/streambuf_iterator.h:369:5: note: template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(std::istreambuf_iterator<_CharT>, std::istreambuf_iterator<_CharT>, const _CharT2&)
     find(istreambuf_iterator<_CharT> __first,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/streambuf_iterator.h:369:5: note:   template argument deduction/substitution failed:
0_0_33391817_14098.cpp:100:21: note:   mismatched types 'std::istreambuf_iterator<_CharT>' and 'char*'
   int ans = find(str);
                     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_33391817_14098.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:3770:5: note: template<class _IIter, class _Tp> _IIter std::find(_IIter, _IIter, const _Tp&)
     find(_InputIterator __first, _InputIterator __last,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:3770:5: note:   template argument deduction/substitution failed:
0_0_33391817_14098.cpp:100:21: note:   candidate expects 3 arguments, 1 provided
   int ans = find(str);
                     ^


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