View Compilation Error

0_0_38774962_14192.cpp:3:9: error: macro names must be identifiers
    3 | #define <<endl  \n
      |         ^~
0_0_38774962_14192.cpp:26:30: error: stray '\' in program
   26 |                 cout<<b[a[n]]\n;
      |                              ^
0_0_38774962_14192.cpp: In function 'void solve()':
0_0_38774962_14192.cpp:26:30: error: expected ';' before 'n'
   26 |                 cout<<b[a[n]]\n;
      |                              ^~
      |                              ;