Although reallocating an array is an O(n) operation, it is amortized over n items, so the cost per item is O(n²).

Name: Although reallocating an array is an O(n) operation, it is amortized over n items, so the cost per item is O(n 2 ).
Brand: Quizplus
Rating: 4.8 (40 reviews)

Question

Quizplus · Accepted Answer

Reallocating an array is indeed an O(n) operation, but when amortized over n items, the cost per item becomes O(1), not O(n). This is because, although reallocations can be expensive, they happen less frequently as the array grows.

Although Reallocating an Array Is an O(n) Operation, It Is