View Compilation Error

0_0_39575963_11538.cpp: In function 'Node query(int, ll, ll)':
0_0_39575963_11538.cpp:82:9: error: 'ill' was not declared in this scope; did you mean 'll'?
   82 |         ill mid=tr[u].l+tr[u].r>>1;
      |         ^~~
      |         ll
0_0_39575963_11538.cpp:83:15: error: 'mid' was not declared in this scope
   83 |         if(r<=mid)  return query(u<<1,l,r);
      |               ^~~