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View Compilation Error

0_0_29419570_13517.cpp: In function 'int main()':
0_0_29419570_13517.cpp:36:40: error: no match for 'operator=' (operand types are 'zw' and 'long long int')
   int n=rd();for(int i=1;i<=n;i++) b[i]=rd(),a[b[i]].x++;sort(b+1,b+1+n);
                                        ^
0_0_29419570_13517.cpp:36:40: note: candidates are:
0_0_29419570_13517.cpp:18:8: note: zw& zw::operator=(const zw&)
 struct zw{double x,y;}a[N],b[N];
        ^
0_0_29419570_13517.cpp:18:8: note:   no known conversion for argument 1 from 'long long int' to 'const zw&'
0_0_29419570_13517.cpp:18:8: note: zw& zw::operator=(zw&&)
0_0_29419570_13517.cpp:18:8: note:   no known conversion for argument 1 from 'long long int' to 'zw&&'
0_0_29419570_13517.cpp:36:47: error: no match for 'operator[]' (operand types are 'zw [2097165]' and 'zw')
   int n=rd();for(int i=1;i<=n;i++) b[i]=rd(),a[b[i]].x++;sort(b+1,b+1+n);
                                               ^
0_0_29419570_13517.cpp:37:15: error: no match for 'operator<<' (operand types are 'zw' and 'int')
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
               ^
0_0_29419570_13517.cpp:37:15: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2772:5: note: template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&)
     operator<<(basic_ostream<_CharT, _Traits>& __os,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2772:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<_CharT, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:471:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:471:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<_CharT, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:476:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:476:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<_CharT, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:482:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)
     operator<<(basic_ostream<char, _Traits>& __out, char __c)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:482:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<char, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:488:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)
     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:488:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<char, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:493:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)
     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:493:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<char, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:513:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:513:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<_CharT, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:609:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ostream.tcc:321:5: note: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ostream.tcc:321:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<_CharT, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:530:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)
     operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:530:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<char, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:543:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)
     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:543:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<char, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as=n*(n-1)*(n-2)/6;
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_29419570_13517.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:548:5: note: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)
     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:548:5: note:   template argument deduction/substitution failed:
0_0_29419570_13517.cpp:37:17: note:   'zw' is not derived from 'std::basic_ostream<char, _Traits>'
   int len=b[n]<<1,l=1,cnt=0;ll res=0,as


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