Problem	summoning
User	aiden
Submission Time	2026-06-26 16:01:02
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

summoning.cpp: In function ‘int main()’:
summoning.cpp:13:8: error: lvalue required as decrement operand
13 | free--;
| ^~
summoning.cpp:20:8: error: lvalue required as increment operand
20 | free++;
| ^~