What is the priority of a null node?

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Editor">Editor Staff asked 5 months ago

What is the priority of a null node?
 
(a) 1
 
(b) 0
 
(c) random number
 
(d) infinity
 
My doubt is from Binary Trees in division Binary Trees of Data Structures & Algorithms I
 
I got this question in an online quiz.

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1 Answers
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Editor">Editor Staff answered 5 months ago

The correct answer is (d) infinity
 
Easiest explanation – The priority of a null node is set to be infinity in a treap so that during deletion, priority of that particular node is set to infinity, rotated and freed.


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