Problem	festival
User	shenshiqi
Submission Time	2026-05-10 12:40:57
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

festival.cpp: In function ‘std::vector<int> max_coupons(int, std::vector<int>, std::vector<int>)’:
festival.cpp:14:3: error: ‘sort’ was not declared in this scope; did you mean ‘qsort’?
14 | sort(coupons.begin(), coupons.end(), [](auto& a, auto& b){
| ^~~~
| qsort