Final answer:
The amortized time complexity of one add operation is N.
Step-by-step explanation:
The amortized time complexity of one add operation can be calculated by dividing the total time taken for N consecutive add operations (N²) by N, which gives N.
Therefore, the amortized time complexity of one add operation is N.
For example, if you perform 10 consecutive add operations, the total time taken would be 10² = 100 units of time. And the amortized time complexity for each add operation would be 100/10 = 10 units of time.