Why my deque spoj code is throwing this error?

Hey @Anku47
Your code is giving u error because on line 34 u are using this q.push_back();
You are not pushing any value and leaving it as empty which is giving u error.

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.