Practice Complexity Analysis (44.1.9) - Matrix multiplication - Data Structures and Algorithms in Python
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Complexity Analysis

Practice - Complexity Analysis

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Practice Questions

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Question 1 Easy

What is the order of complexity for multiplying two matrices of size m x n and n x p?

💡 Hint: Consider how many operations are required to produce an output matrix.

Question 2 Easy

True or False: The associative property means the order of multiplication will not affect the final matrix.

💡 Hint: Reflect on how matrix multiplication works.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the time complexity for a naive matrix multiplication of size n x n?

O(n)
O(n^2)
O(n^3)

💡 Hint: Think about how many operations are required to fill the resulting matrix.

Question 2

True or False: Changing the order of multiplication affects the final result when multiplying matrices.

True
False

💡 Hint: Reflect on how associative property works.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

You have four matrices: A (2x3), B (3x4), C (4x1), D (1x2). Calculate the most efficient multiplication sequence and the total number of operations involved.

💡 Hint: Break down the multiplications step by step, calculating after each combination.

Challenge 2 Hard

Explain how you would derive the cost formula for matrix products from M_i to M_j using dynamic programming. What factors need consideration in this derivation?

💡 Hint: Focus on how previous multiplication results can feed into larger calculations.

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