Problem	floors
User	PlayVoltz
Submission Time	2023-09-01 22:00:05
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

floors.cpp: In function ‘int main()’:
floors.cpp:17:15: error: ‘class std::unordered_set<int>’ has no member named ‘upper_bound’
17 | auto it = s.upper_bound(a);
| ^~~~~~~~~~~