Given an input x, create a square matrix y of zeros with x rows and x columns.
please recheck your testsuite.ps:may I suggest you finish some problems by yourself before you create one.because this kinda problem had been repeated like hundreds times.we really tired of seeing this.
I fixed the problem in the test suite.
Filter AC, pass DC
Insert zeros into vector
Do Fast Fourier Transformation
Produce a sine wave
Create a Standard Size Vector
Square a Number
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