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Drizzle

In 3) and 4), shouldn't it be +8x_3 not x_2?

annag

The values array contains the non-zero elements of row i in index i. The cols array indicates the column index for each number in the values array. The row_starts array indicates which of the 7 numbers begin a new collection in the values + cols array.

kapalani

Also I think in step 2, flags array should be [1, 0, 1, 1, 1, 0, 0] since the row_start array contains 4 elements, so the flags array should contain 4 1's