Problem	combo
User	chenweilian
Submission Time	2023-03-18 09:20:36
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

combo.cpp: In function ‘std::string guess_sequence(int)’:
combo.cpp:18:6: error: ‘i’ was not declared in this scope
18 | REP(i, M) { idx[i] = i; }
| ^
combo.cpp:18:2: error: ‘REP’ was not declared in this scope
18 | REP(i, M) { idx[i] = i; }
| ^~~