Problem	foreveralone
User	P55D2K
Submission Time	2023-04-21 16:54:53
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

foreveralone.cpp: In function ‘int main()’:
foreveralone.cpp:16:21: error: no match for ‘operator[]’ (operand types are ‘std::unordered_set<bool>’ and ‘int’)
16 | is_alone[a] = false;
| ^
foreveralone.cpp:17:21: error: no match for ‘operator[]’ (operand types are ‘std::unordered_set<bool>’ and ‘int’)
17 | is_alone[b] = false;
| ^
foreveralone.cpp:22:21: error: no match for ‘operator[]’ (operand types are ‘std::unordered_set<bool>’ and ‘int’)
22 | if (is_alone[i])
| ^