View Compilation Error

0_0_39652000_7832.cpp: In function 'int main()':
0_0_39652000_7832.cpp:38:26: error: 'check' was not declared in this scope; did you mean 'check2'?
   38 |         while(head<tail&&check(q[head],q[head+1],i))head++;
      |                          ^~~~~
      |                          check2
0_0_39652000_7832.cpp:43:34: error: 'check' was not declared in this scope; did you mean 'check2'?
   43 |                 while(head<tail&&check(i-t,q[tail-1],q[tail]))tail--;
      |                                  ^~~~~
      |                                  check2