Artificial Intelligence: A Modern Approach
3rd Edition
ISBN: 9780136042594
Author: Stuart Russell, Peter Norvig
Publisher: Prentice Hall
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Chapter 6, Problem 5E
Explanation of Solution
Solving cryptarithmetic problem:
a. Choose the X3 variable. Its domain is{0,1}.
b. Choose the value 1 for X3. (The user can’t choose 0; it wouldn’t survive forward checking, because it would force F to be 0, and the leading digit of the sum must be non-zero.)
c. Choose F, because it has only one remaining value.
d. Choose the value 1 for F.
e. Now X2 and X1 are tied for minimum remaining values at 2; let’s choose X2.
f. Either value survives forward checking; let’s choose 0 for X2.
g. Now X1 has the minimum remaining values.
h. Again, arbitrarily choose 0 for the value of X1...
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Chapter 6 Solutions
Artificial Intelligence: A Modern Approach
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