Problem	combo
User	shenshiqi
Submission Time	2026-07-24 16:55:22
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

combo.cpp:4:18: error: ‘chrono’ has not been declared
4 | std::mt19937 gen(chrono::high_resolution_clock::now().time_since_epoch().count());
| ^~~~~~