Problem	inversions
User	Usu
Submission Time	2026-06-14 19:32:57
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

inversions.cpp: In function ‘int main()’:
inversions.cpp:36:5: error: ‘fen’ was not declared in this scope
36 | fen=Fenwick(n); int count=0;
| ^~~