Give a justification of why the computeFailKMP method (Code Fragment 13.4) runs in O(m) time on a
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1 private static int[] computeFailKMP(char[ ] pattern) { int m = pattern.length; int[ ] fail = new int[m]; int j = 1; 2 // by default, all overlaps are zero 3 4 int k = 0; while (j < m) { if (pattern[i] = faili] = k + 1; j++; k++; } else if (k > 0) k = fail[k-1]: else 5 // compute fail li] during this pass, if nonzero // k +1 characters match thus far pattern[k]) { 10 // k follows a matching prefix 11 12 // no match found starting at j 13 14 j++; } return fail; 15 16 17 }
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Related Book For
Data Structures and Algorithms in Java
ISBN: 978-1118771334
6th edition
Authors: Michael T. Goodrich, Roberto Tamassia, Michael H. Goldwasser
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