[理工] 台大資演
QQQQ
遞迴推導出答案算是證明嗎,想請教一下m(_ _)m
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推
02/11 10:06, , 1F
02/11 10:06, 1F
第一大題~~ 第一小題我忘記再證明f(n)<=c*nlogn(忘記答案了反正我只有遞迴推導出
來...)
※ 編輯: ssssIssss (223.140.46.18), 02/11/2017 10:07:25
推
02/11 10:07, , 2F
02/11 10:07, 2F
本來想說回頭再證結果寫太久,一直寫到下課才把題目都寫完Orz
※ 編輯: ssssIssss (223.140.46.18), 02/11/2017 10:08:41
推
02/11 10:11, , 3F
02/11 10:11, 3F
→
02/11 10:12, , 4F
02/11 10:12, 4F
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02/11 10:12, , 5F
02/11 10:12, 5F
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02/11 10:12, , 6F
02/11 10:12, 6F
所以不用再用定義驗證一次嗎
但是第三小題我用遞迴樹,感覺就是必須要再驗證惹
※ 編輯: ssssIssss (223.140.46.18), 02/11/2017 10:15:21
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02/11 10:16, , 7F
02/11 10:16, 7F
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02/11 10:17, , 8F
02/11 10:17, 8F
Lawler?
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02/11 10:17, , 9F
02/11 10:17, 9F
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02/11 10:20, , 10F
02/11 10:20, 10F
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02/11 10:20, , 11F
02/11 10:20, 11F
推
02/11 10:20, , 12F
02/11 10:20, 12F
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02/11 10:24, , 13F
02/11 10:24, 13F
推
02/11 12:13, , 14F
02/11 12:13, 14F
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02/11 12:13, , 15F
02/11 12:13, 15F
推
02/11 12:15, , 16F
02/11 12:15, 16F
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02/11 12:18, , 17F
02/11 12:18, 17F
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02/11 12:19, , 18F
02/11 12:19, 18F
推
02/11 12:21, , 19F
02/11 12:21, 19F
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02/11 12:22, , 20F
02/11 12:22, 20F
推
02/11 12:23, , 21F
02/11 12:23, 21F
推
02/11 12:59, , 22F
02/11 12:59, 22F
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02/11 13:03, , 23F
02/11 13:03, 23F
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02/11 13:03, , 24F
02/11 13:03, 24F
推
02/11 13:06, , 25F
02/11 13:06, 25F
推
02/11 13:13, , 26F
02/11 13:13, 26F
推
02/11 13:17, , 27F
02/11 13:17, 27F
推
02/11 13:17, , 28F
02/11 13:17, 28F
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02/11 13:19, , 29F
02/11 13:19, 29F
推
02/11 13:21, , 30F
02/11 13:21, 30F
ai,我覺得len全部印出來沒什麼意義QQ
※ 編輯: ssssIssss (223.140.46.18), 02/11/2017 13:24:43
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02/11 13:25, , 31F
02/11 13:25, 31F
推
02/11 13:27, , 32F
02/11 13:27, 32F
※ 編輯: ssssIssss (140.112.25.106), 02/11/2017 13:34:34
推
02/11 14:36, , 33F
02/11 14:36, 33F
推
02/11 14:51, , 34F
02/11 14:51, 34F
len[i-1, j-1]+1
(A, xxx, i-1, j-1)
xxx是我忘了題目參數順序了,大概就是都減一
※ 編輯: ssssIssss (223.140.103.29), 02/11/2017 14:58:11
推
02/11 15:02, , 35F
02/11 15:02, 35F
→
02/11 15:02, , 36F
02/11 15:02, 36F
推
02/11 15:02, , 37F
02/11 15:02, 37F
→
02/11 15:02, , 38F
02/11 15:02, 38F
其實我是覺得不會倒扣耶,畢竟沒給機制怎麼扣都不太合理
※ 編輯: ssssIssss (223.140.103.29), 02/11/2017 15:12:40
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02/11 15:14, , 39F
02/11 15:14, 39F
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02/11 15:32, , 40F
02/11 15:32, 40F
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02/11 15:32, , 41F
02/11 15:32, 41F
別想了,快準備下一科!
※ 編輯: ssssIssss (114.44.199.115), 02/11/2017 15:59:26
推
02/11 18:05, , 42F
02/11 18:05, 42F
→
02/11 18:05, , 43F
02/11 18:05, 43F
→
02/11 18:05, , 44F
02/11 18:05, 44F
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02/11 18:06, , 45F
02/11 18:06, 45F
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02/11 19:34, , 46F
02/11 19:34, 46F
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02/11 19:34, , 47F
02/11 19:34, 47F
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02/11 19:34, , 48F
02/11 19:34, 48F
若是DAG那應該都是可以的,看什麼會optimal吧?
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02/11 20:02, , 49F
02/11 20:02, 49F
DAG還要DP嗎?還是Lawler即可?
推
02/11 20:04, , 50F
02/11 20:04, 50F
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02/11 20:04, , 51F
02/11 20:04, 51F
那relaxing依序呢QQ
※ 編輯: ssssIssss (223.140.111.120), 02/11/2017 20:53:42
推
02/11 21:15, , 52F
02/11 21:15, 52F
只是更方便快速吧~ 因為圖多很多限制條件了
推
02/11 21:23, , 53F
02/11 21:23, 53F
※ 編輯: ssssIssss (223.136.177.94), 02/12/2017 07:39:06