Course Solutions Uncategorized (Solved) : 3 8 Pts Bottom Longest Paths Problem Set 7 Wrote Longest Path Memoized Recursive Top Dynam Q32563055 . . . .

(Solved) : 3 8 Pts Bottom Longest Paths Problem Set 7 Wrote Longest Path Memoized Recursive Top Dynam Q32563055 . . . .

 

#3 (8 pts) Bottom-Up Longest-Paths In Problem Set 7 you wrote Longest-Path-Memoized, a recursive (top-down) dynamic programming solution to the longest paths problem. Here you will solve the same problem in Θ(V+E) using a bottom-up dynamic programming approach. Hint: We need to arrange to solve smaller problems before larger ones: use topological sort (which you may assume has already been written). You may want to write the explanation for (b) before writing the pseudocode, but then revise it to reference the lines of code. (a) (4 pts) Write the pseudocode for Longest-Path-Bottom-Up. (b) (2 pts) Explain why your algorithm works; in particular, why topological sort is useful. (c) (2 pts) Analyze its asymptotic run time.

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