Problem	reflection
User	chenweilian
Submission Time	2023-03-04 20:31:05
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

reflection.cpp: In function ‘int main()’:
reflection.cpp:118:20: error: no match for ‘operator-’ (operand types are ‘pii’ {aka ‘std::pair<int, int>’} and ‘pii’ {aka ‘std::pair<int, int>’})
118 | int k = (a - x) / 2;
| ~ ^ ~
| | |
| | pair<[...],[...]>
| pair<[...],[...]>
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
from /usr/include/c++/9/bits/char_traits.h:39,
from /usr/include/c++/9/ios:40,
from /usr/include/c++/9/ostream:38,
from /usr/include/c++/9/iostream:39,
from reflection.cpp:1:
/usr/include/c++/9/bits/stl_iterator.h:415:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std: