Divide and Conquer Michael Tsai 2011225 14 Recurrences

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Divide and Conquer Michael Tsai 2011/2/25

Divide and Conquer Michael Tsai 2011/2/25

14 Recurrences

14 Recurrences

20 股市大亨: 嘗試三 Day 1 2 3 Price 100 113 110 13 4 6

20 股市大亨: 嘗試三 Day 1 2 3 Price 100 113 110 13 4 6 7 8 85 102 86 63 -3 -16 -23 -3 -25 5 20 9 10 13 14 15 16 17 81 101 94 106 101 79 94 90 97 18 -7 -5 -22 15 -4 7 20 11 12 12

24 股市大亨: 嘗試三 Base Case: n=1的時候 maximum subarray? 就是它自己.

24 股市大亨: 嘗試三 Base Case: n=1的時候 maximum subarray? 就是它自己.

26 股市大亨 之 酥多扣的(pseudo-code) Base Case Recursive Case Divide Combine

26 股市大亨 之 酥多扣的(pseudo-code) Base Case Recursive Case Divide Combine

27 執行時間分析 n個數字找max subarray Base case: n=1的時候直接return. Recursive case: Divide: 2個 n/2個數字找max subarray Combine:

27 執行時間分析 n個數字找max subarray Base case: n=1的時候直接return. Recursive case: Divide: 2個 n/2個數字找max subarray Combine: 1. 確認n>1, 計算中間點位置等等 2. 尋找通過mid的max subarray 3. 比較三個max subarray的大小決定最後結果

Divide and Conquer Michael Tsai 2011225 14 RecurrencesDivide and Conquer Michael Tsai 2011225 14 Recurrences
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