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[理工] [DS]成大99-電通甲

[ Grad-ProbAsk ]17 留言, 推噓總分: 0

作者: aerystyle - 發表於 2011/02/06 22:27(13年前)

1^F→ybite:我算的結果跟你一致！02/06 22:38

16^F→ybite:碰到最大的和「祖父右兒子」換，最小和「祖父左兒子」換02/07 09:39

[理工][離散] perfect matching

[ Grad-ProbAsk ]22 留言, 推噓總分: +7

作者: ai305428d - 發表於 2011/02/02 10:39(13年前)

4^F→ybite:答案確實是at most one02/02 11:17

5^F→ybite:證明正在想qqqqqq02/02 11:17

12^F→ybite:Matching: 在一個圖中取數個邊，使無兩邊共用同一個端點02/02 11:58

13^F→ybite:Perfect Matching: 圖中的所有點都包含在Matching中02/02 11:59

14^F→ybite:例子：對雙分圖K3,3，兩側分別有abc和xyz三點來說02/02 12:03

16^F→ybite:a-x, b-y, c-z 是一種Perfect matching02/02 12:03

17^F→ybite:不過雙分圖的情況會特別叫Complete matching orz02/02 12:04

19^F→ybite:啊不對，Complete Matching不是這樣... Orz02/02 12:05

20^F→ybite:黃子嘉的書的話在演算法分析 > 配對理論 8-502/02 12:05

Re: [理工] [線代] det(A)

[ Grad-ProbAsk ]4 留言, 推噓總分: 0

作者: tetragramm - 發表於 2011/02/02 02:41(13年前)

1^F→ybite:還沒看到rank，先推一個認真！02/02 10:57

[理工] [資結] tree representation

[ Grad-ProbAsk ]13 留言, 推噓總分: +5

作者: boy5548 - 發表於 2011/02/01 22:12(13年前)

2^F→ybite:題目只有這樣？沒有說是前序中序還是後序嗎？02/01 22:18

5^F→ybite:剛剛查了一下總算搞懂題目了 Orz 我也覺得你寫的是對的。02/01 22:29

Re: [理工] [線代] det(A)

[ Grad-ProbAsk ]6 留言, 推噓總分: +1

作者: ybite - 發表於 2011/02/01 22:02(13年前)

8^F→ybite:啊對，都忘了這個大瑕疵qqqqq02/02 00:55

[理工] [DS] Some Problem..

[ Grad-ProbAsk ]14 留言, 推噓總分: +3

作者: zelkova - 發表於 2011/01/31 03:34(13年前)

1^F推ybite:Q4我也懷疑答案是錯的01/31 10:20

Re: [理工] [資結] Symmetric Min-Max Heap

[ Grad-ProbAsk ]2 留言, 推噓總分: +2

作者: boy5548 - 發表於 2011/01/30 10:25(13年前)

1^F推ybite:推一下，應該是對的01/30 10:38

Re: [理工] [資結]2-3 Tree的老問題!!!已刪文

[ Grad-ProbAsk ]4 留言, 推噓總分: +3

作者: starbury8 - 發表於 2011/01/29 01:22(13年前)

4^F→ybite:推這篇01/30 10:44

[理工] [ds] 96 清大資工

[ Grad-ProbAsk ]17 留言, 推噓總分: 0

作者: ai305428d - 發表於 2011/01/27 22:09(13年前)

1^F→ybite:7(f)：鴿籠原理問題。引述黃子嘉離散教材的證法：01/27 22:31

2^F→ybite:假設x_k和y_k表示第k個數開始最長的遞增/遞減序列長度01/27 22:31

3^F→ybite:以反證法出發，假設遞增遞減序列最長只到n01/27 22:32

4^F→ybite:那(x_k, y_k)最多只有n^2個組合，但因為有n^2+1個數字01/27 22:33

5^F→ybite:一定可以找到不相等的i,j使(x_i,y_i)=(x_j,y_j)01/27 22:33

6^F→ybite:可推得(x_i>x_j or y_i>y_j)，造成矛盾。01/27 22:34

7^F→ybite:6(a)詳細希望 Orz01/27 22:34

Re: [理工] [DS] 98-台大資工

[ Grad-ProbAsk ]3 留言, 推噓總分: 0

作者: ybite - 發表於 2011/01/26 00:46(13年前)

3^F→ybite:通通更正 ORz01/27 00:11

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