Problem	mirrors
User	haiquan
Submission Time	2026-03-06 13:52:09
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

mirrors.cpp: In function ‘int main()’:
mirrors.cpp:41:29: error: no match for ‘operator-’ (operand types are ‘std::vector<long long int>’ and ‘__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type’ {aka ‘long long int’})
41 | ll sum_R = pref - pref[i];
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 mirrors.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::reverse_iterator<_IteratorR>&)’
415 | operator-(const reverse_iterator<_IteratorL&