Problem	eeducation
User	Zachareeeee
Submission Time	2025-01-11 03:17:44
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

eeducation.cpp: In function ‘int main()’:
eeducation.cpp:20:9: error: ‘class std::unordered_set<long long int>’ has no member named ‘contains’
20 | if (B.contains(x)){
| ^~~~~~~~