Problem	prefixsums
User	peterpam
Submission Time	2025-08-31 10:09:06
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

prefixsums.cpp: In function ‘int main()’:
prefixsums.cpp:18:20: error: ‘pref’ was not declared in this scope
18 | cout<<p[r]-pref[l-1]<<"\n";
| ^~~~