Problem	lineup
User	Fax
Submission Time	2026-11-08 17:25:39
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

lineup.cpp: In function ‘int main()’:
lineup.cpp:36:11: error: no match for ‘operator[]’ (operand types are ‘std::unordered_set<long long int>’ and ‘long long int’)
36 | us[arr[i].second]++;
| ^
lineup.cpp:37:14: error: no match for ‘operator[]’ (operand types are ‘std::unordered_set<long long int>’ and ‘long long int’)
37 | if(us[arr[i].second] == 1) have++;
| ^