HW 4            Due 28th April.
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Do the following exercises from Chapter 6 of [DPV]:

Exercise 6.1 (recall that we did this in O(n log n) time using divide and conquer), 6.6, 6.7, 6.8, 6.11, 6.17, 6.18, 6.19, 6.22, 6.25.