Problem	platonic12
User	estkn
Submission Time	2026-05-22 14:52:48
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

platonic12.cpp: In function ‘int main()’:
platonic12.cpp:10:19: error: ‘a’ cannot be used as a function
10 | cout << (a(a+1))/2
| ^