View Compilation Error

0_0_38823871_17512.cpp: In function 'int main()':
0_0_38823871_17512.cpp:63:16: error: 'T' was not declared in this scope
   63 |         cin >> T;
      |                ^
0_0_38823871_17512.cpp:9:11: error: 'first' was not declared in this scope
    9 | #define x first
      |           ^~~~~
0_0_38823871_17512.cpp:80:32: note: in expansion of macro 'x'
   80 |                         cin >> x >> y;
      |                                ^
0_0_38823871_17512.cpp:10:11: error: 'second' was not declared in this scope
   10 | #define y second
      |           ^~~~~~
0_0_38823871_17512.cpp:80:37: note: in expansion of macro 'y'
   80 |                         cin >> x >> y;
      |                                     ^