Summary

Data Structures and Algorithms with Object-Oriented Design Patterns in C++

Summary

For many divide-and-conquer algorithms the running time is given by the general recurrence shown in Equation . Solutions to the recurrence depend on the relative values of the constants a, b and k. Specifically, the solutions satisfy the following bounds:

equation33113

Table how to apply Equation to find the running times of the divide-and-conquer algorithms described in the preceding sections. Comparing the solutions in Table with those given in Table shows the results obtained using the general formula agree with the analyses done in the preceding sections.

program recurrence a b k case solution

Program T(n)=T(n/2)+O(1) 1 2 0

Program T(n)=2T(n/2)+O(1) 2 2 0

Program T(n)=2T(n/2)+O(n) 2 2 1

Table: Computing Running Times using Equation

program	recurrence	a	b	k	case	solution
Program	T(n)=T(n/2)+O(1)	1	2	0
Program	T(n)=2T(n/2)+O(1)	2	2	0
Program	T(n)=2T(n/2)+O(n)	2	2	1