-) {w € {0, 1}* | w contains at least three 1s} ) {w € {0, 1}* | w is equal to its reverse and w has even length} ) {w € {0, 1}* | the length of w is odd and the middle symbol is 0} -) {a'b>c* | i, j, k > 0, and i = j or i = k} lution:

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1.
Give context-free grammars that generate the following languages.
(a) {w E {0, 1}* | w contains at least three 1s}
(b) {w E {0,1}* | w is equal to its reverse and w has even length}
(c) {w € {0,1}* | the length of w is odd and the middle symbol is 0}
(d) {a'b'c* | i, j, k > 0, and i = j or i = k}
Solution:
Transcribed Image Text:1. Give context-free grammars that generate the following languages. (a) {w E {0, 1}* | w contains at least three 1s} (b) {w E {0,1}* | w is equal to its reverse and w has even length} (c) {w € {0,1}* | the length of w is odd and the middle symbol is 0} (d) {a'b'c* | i, j, k > 0, and i = j or i = k} Solution:
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