Problem	prefixsums
User	Feiyang
Submission Time	2025-06-17 16:45:58
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

prefixsums.cpp: In function ‘int main()’:
prefixsums.cpp:18:25: error: ‘j’ was not declared in this scope
18 | answer += a[j];
| ^