View Compilation Error

0_0_38811579_29311.cpp: In function 'int main()':
0_0_38811579_29311.cpp:15:9: error: 'LL' was not declared in this scope
   15 |         LL ans = 0;
      |         ^~
0_0_38811579_29311.cpp:16:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   16 |         ans += n / 2;
      |         ^~~
      |         abs