answer.code: In function ‘int main()’:
answer.code:12:5: error: ‘ll’ was not declared in this scope
   12 |     ll ans=0;
      |     ^~
answer.code:14:11: error: expected ‘;’ before ‘p’
   14 |         ll p=0;
      |           ^~
      |           ;
answer.code:16:13: error: ‘p’ was not declared in this scope
   16 |             p-=a[j];p+=b[j];
      |             ^
answer.code:18:9: error: ‘ans’ was not declared in this scope; did you mean ‘abs’?
   18 |         ans=max(ans,p);
      |         ^~~
      |         abs
answer.code:18:21: error: ‘p’ was not declared in this scope
   18 |         ans=max(ans,p);
      |                     ^
answer.code:20:11: error: ‘ans’ was not declared in this scope; did you mean ‘abs’?
   20 |     cout<<ans<<endl;
      |           ^~~
      |           abs