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4 cards from this section. Quick, good the night before a test.
What is a bad string?
Think of substrings that should not appear.
Define a recurrence relation.
Focus on how a sequence can be defined recursively.
What qualifies as a bad string?
Focus on the definition of bad strings presented in class.
True or False: Recurrence relations can only define numeric sequences.
Think about how we've defined strings using recurrence.
Calculate the total number of valid bit strings of length 5 that do not contain '000'.
Set your base cases right from 0 to 4.
Propose an algorithm that can compute the number of valid strings based on the discussed recurrence relations efficiently.
Think about how to minimize recalculations by storing previous results.
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