Codechef doubt in lunchtiem

#1

https://www.codechef.com/problems/SPTREE
I have read the editorial still I am unable to solve

Please help me to solve this.Its appearing complicated

#2

hello @Somasree

read about binary lifiting technique ,this problem is based on same technique.

#3

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.