0_0_38549342_32272.cpp: In member function 'void Splay_tree::rev1(int)':
0_0_38549342_32272.cpp:14:49: error: 'swap' was not declared in this scope
void rev1(int x){if(x)swap(ch[x][0],ch[x][1]),rev[x]^=1;}
^
0_0_38549342_32272.cpp:14:49: note: suggested alternatives:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/unordered_set:48:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:116,
from 0_0_38549342_32272.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/unordered_set.h:1325:5: note: 'std::swap'
swap(unordered_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/exception:162:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:39,
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_38549342_32272.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/exception_ptr.h:160:5: note: 'std::__exception_ptr::swap'
swap(exception_ptr& __lhs, exception_ptr& __rhs)
^
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