Problem	fenwicktree
User	shoryu386
Submission Time	2023-12-25 01:52:09
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

fenwicktree.cpp: In function ‘void update(long long int, long long int, long long int)’:
fenwicktree.cpp:7:5: error: ‘X’ was not declared in this scope
7 | X++; y++;
| ^