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Examples<br />
• [Number of Paths in a DAG]<br />
•<br />
•<br />
• [Longest Path in a DAG]<br />
• just use the semiring<br />
•<br />
just use the counting semiring (N, +, , 0, 1)<br />
note: this is not an optimization problem!<br />
(R ∪{−∞}, max, +, −∞, 0)<br />
[Part-of-Speech Tagging with a Hidden Markov Model]<br />
Liang Huang<br />
15<br />
Dynamic Programming