Why there is condition that idx>1?

#1

Why there is condition that idx>1?

#2

this is because we have already block the 0th index by pushing -1 in constructor

now 1st index is root node it has no parent

so we we move to parent only if idx>1

i recommend to watch video again it will give you more clearity

i hope this helps
if yes hit a like and don’t forgot to mark doubt as resolved
if you have more doubts regarding this feel free to ask

#3

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