Question: A matrix is called a Sparse Matrix if majority of its elements are zero.Storing a sparse matrix as list - of - lists is not

A matrix is called a Sparse Matrix if majority of its elements are zero.Storing a sparse matrix as list-of-lists is not very efficient.Alternatively, one can store only the non-zero elements, by using a dictionary in Python.keys: indices (i,j) of nonzero elementsvalues: non-zero values to be stored.In order to keep the size of the matrix, add a special key size, which contains a tuple (n,m) containing the matrix

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