Problem	4sum
User	hitsuuj
Submission Time	2025-08-26 10:33:45
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

4sum.cpp: In function ‘int bag(int, int)’:
4sum.cpp:18:39: error: ‘inv’ was not declared in this scope; did you mean ‘inf’?
18 | int bag(int a,int b){return kal(sf(a),inv(b));}
| ^~~
| inf