Algorithmic Toolbox week4 Divide and Conquer --- Polynomial Multiplication

Problem Overview and Native Solution

Multiplying Polynomials

视频中把2n-2写成了2n-1

Multiplying Polynomials

Well in that case, what you you could do is just pad out the smaller polynomial, the lower degree polynomial, to have zeros for its earlier coefficients. (填充0，让我想起来了AES加密的填充，哈哈)

Naive Divide and Conquer Algorithm

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Plus, then,in order to take the results and do our addition that's going
to take order n time. So some constant k, times that.

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