Medium-Easy Understand Heaps & Priority Queues Multiple Choice

What is the time complexity of Reorganize String (LC 767)?

Understand — Tests comprehension and ability to explain concepts.

Answer Options

A O(n)

B O(n log n)

C O(n log k) where k is alphabet size

D O(n²)

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This question is from the Heaps & Priority Queues topic (Data Structures).

In a min-heap stored as an array, what is the parent index of the node at index i?

What is the time complexity of extracting the minimum from a min-heap?

What is the heap invariant for a min-heap?

What is the time complexity of peek() (see minimum without removing) in a min-heap?

Why use a min-heap of size k to find the kth LARGEST element?