Problem	pigeonhole
User	zzxlovecsn
Submission Time	2026-05-17 12:29:22
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

pigeonhole.cpp: In function ‘int main()’:
pigeonhole.cpp:69:13: error: no match for ‘operator--’ (operand type is ‘std::__detail::_Node_iterator<std::pair<const int, int>, false, false>’)
69 | --it;
| ^~~~