Problem	3nplus1
User	yihai
Submission Time	2026-01-21 17:23:11
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

cc1plus: error: ‘::main’ must return ‘int’
3nplus1.cpp: In function ‘int main()’:
3nplus1.cpp:10:5: error: unable to find numeric literal operator ‘operator""n’
10 | n=3n+1;
| ^~