Problem	xmas
User	Zhuoxun
Submission Time	2025-03-07 14:47:00
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

xmas.cpp: In function ‘int main()’:
xmas.cpp:9:26: error: ‘M’ was not declared in this scope
9 | for (int i = 0; i <= M; i++)
| ^