Problem	fenwicktree_easy
User	bz
Submission Time	2023-12-04 22:31:46
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

fenwicktree_easy.cpp: In function ‘void update(int, int)’:
fenwicktree_easy.cpp:24:17: error: ‘a’ was not declared in this scope
24 | int d = v - a[p];
| ^