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      Question

      The amortized time for inserting into a dynamic array

      (like C++ vector) is:
      A O(1) Correct Answer Incorrect Answer
      B O(log n) Correct Answer Incorrect Answer
      C O(n) Correct Answer Incorrect Answer
      D O(n log n) Correct Answer Incorrect Answer
      E O(√n) Correct Answer Incorrect Answer

      Solution

      Occasional reallocation takes O(n), but averaged over all insertions the amortized cost is constant.

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