lect07 - Lecture 7 Variations of DP A problem on strip:...

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Lecture 7 Variations of DP
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A problem on strip : outside weighted disks cover Inside points with minimum total weight. p 1 p 2 p i Ti(D,D’) : minimum weight set with D, D’, dominating p 1 , …, p i such that (1) D (lowest intersection point on L) among disks above the strip (2) D’( highest intersection point on L) among disks below the strip L
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p 1 p 2 p i-1 D 1 (lowest intersection point on L) among disks above the strip, in T i (D,D’) D 2 (highest intersection point on L) among disks below the strip, in T i (D,D’) L
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= - otherwise. 0 , if 1 ] [ where )} ( ] [ ) ( ] [ ) ( { min ) ( 1 1 2 1 2 1 1 , 2 1 D D D D D' c D' D + D c D D + ,D D T = D,D' T i D D i Dynamic Programming
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= - otherwise. 0 , if 1 ] [ where )} ( ] [ ) ( ] [ )) ( ( { min )) ( ( 1 1 2 1 2 1 1 , 2 1 D D D D D' c D' D + D c D D + ,D D T w = D,D' T w i D D i Dynamic Programming
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p j p i p i-1 D . does so ), 1 ( covers If 1 D i j p D j - < D1
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DP-type Algorithm Design a table such that computing all elements in the table would solve the considered problem.
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lect07 - Lecture 7 Variations of DP A problem on strip:...

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