Problem	cups
User	YongXin
Submission Time	2023-06-18 22:05:08
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

cups.cpp: In function ‘int main()’:
cups.cpp:23:22: error: no match for ‘operator[]’ (operand types are ‘std::unordered_set<long long int>’ and ‘int’)
23 | v[j]+=x;
| ^