Problem	localexpress
User	Pan
Submission Time	2023-09-06 09:28:22
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

localexpress.cpp: In function ‘int main()’:
localexpress.cpp:22:44: error: expected primary-expression before ‘<<’ token
22 | cout << (ps - arr.back()) % 1000000007;<<endl
| ^~