Problem	defense101
User	birdbird
Submission Time	2026-08-16 16:40:29
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

defense101.cpp: In function ‘std::string multiply(std::string, long long int)’:
defense101.cpp:48:5: error: ‘i’ was not declared in this scope
48 | a[i] += char('0' + carry % 10) + a;
| ^