Problem	fenwicktree_easy
User	PerihelionfromAphelion
Submission Time	2026-09-25 19:12:10
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

fenwicktree_easy.cpp: In function ‘void upd(long long int, long long int)’:
fenwicktree_easy.cpp:12:29: error: expression cannot be used as a function
12 | for (; p <= n; p ++ (p & -p)) ft[p] += v;
| ^
fenwicktree_easy.cpp: In function ‘int32_t main()’:
fenwicktree_easy.cpp:20:10: error: ‘a’ was not declared in this scope
20 | cin >> a[i];
| ^