Explanation Given information: The first method is to determine whether two strings are anagrams by first finding the frequency of each character that appears in the strings. The second method is by first sorting the characters in both strings. Calculation: It is known that the two strings are anagrams if they contain same number of character each having the same frequency. In the first method finding the frequency of each characters can lead to the time complexity of O ( n ) assuming there are total n characters. It will be done for both the string, therefore O ( n ) + O ( n ) = O ( n ) . Now comparing all the characters will also require O ( n ) time complexity. So the big-O estimate for the first algorithm will be O ( n ) + O ( n ) = O ( n )

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ISBN: 9781284056242

Author: David J. Hunter

Publisher: Jones & Bartlett Learning

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Chapter 2.5, Problem 17E

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The big-O estimates for the algorithms for deciding whether two strings are anagrams.

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Chapter 2.5, Problem 16E

Chapter 2.5, Problem 18E

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