Problem	sum2
User	haiquan
Submission Time	2026-06-25 11:10:35
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

sum2.cpp: In function ‘int main()’:
sum2.cpp:16:19: error: ‘i’ was not declared in this scope
16 | int sum = vec[i] + vec[i+1];
| ^