0_0_37726331_12817.cpp: In function 'int main()':
0_0_37726331_12817.cpp:51:34: error: no match for 'operator^=' (operand types are 'std::bitset<200010ull>::reference' and 'int')
if(opt[i]==2) f[x[i]]^=1;
^
0_0_37726331_12817.cpp:51:34: note: candidates are:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42:0,
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_37726331_12817.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:99:3: note: const std::_Ios_Fmtflags& std::operator^=(std::_Ios_Fmtflags&, std::_Ios_Fmtflags)
operator^=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:99:3: note: no known conversion for argument 1 from 'std::bitset<200010ull>::reference' to 'std::_Ios_Fmtflags&'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:139:3: note: const std::_Ios_Openmode& std::operator^=(std::_Ios_Openmode&, std::_Ios_Openmode)
operator^=(_Ios_Openmode& __a, _Ios_Openmode __b)
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:139:3: note: no known conversion for argument 1 from 'std::bitset<200010ull>::reference' to 'std::_Ios_Openmode&'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:177:3: note: const std::_Ios_Iostate& std::operator^=(std::_Ios_Iostate&, std::_Ios_Iostate)
operator^=(_Ios_Iostate& __a, _Ios_Iostate __b)
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:177:3: note: no known conversion for argument 1 from 'std::bitset<200010ull>::reference' to 'std::_Ios_Iostate&'
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:103:0,
from 0_0_37726331_12817.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/future:159:18: note: std::launch& std::operator^=(std::launch&, std::launch)
inline launch& operator^=(launch& __x, launch __y)
^
GCC4.9.2/x86_64-w64-mingw32/include/c++/future:159:18: note: no known conversion for argument 1 from 'std::bitset<200010ull>::reference' to 'std::launch&'
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