作者查詢 / LPH66
作者 LPH66 在 PTT [ Prob_Solve ] 看板的留言(推文), 共389則
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1F推:.....雖然顯然比上一篇好但這篇依然有嚴重的隔空抓藥需求._.03/28 16:02
2F→:你到底是在什麼樣的需求跟環境之下要做這件事?03/28 16:02
1F推:http://en.wikipedia.org/wiki/Pancake_sorting11/29 22:01
2F→:這裡好像有提到一些研究結果11/29 22:01
3F→:中間一段應該是說這個問題是 NP-hard11/29 22:03
4F→:聽說有個版叫做 Math11/09 13:04
1F推:講小正方形不完全對 原PO的理解其實很接近原意了10/07 09:29
2F→:K=4 時用 (2,1) 可以舖 所以比 4 大的 K 都不能用 (2,1)10/07 09:30
3F推:唔等等 用我的理解的話好像 (9,1) 不行無法解釋...10/07 09:33
7F推:嗯 所以我才說我理解錯了 這樣才能解釋10/08 09:09
1F推:那就手算完再把公式寫成程式09/20 14:28
1F推:Euler trail 的變形問題?09/07 17:41
2F推:#1FSo3XqR (Prob_Solve)09/05 00:40
9F推:這問題可以轉換成 maximum independent set 問題06/22 10:47
10F→:感覺不太妙...06/22 10:47
1F推:不會啊 我們總是可以用一個有理數表示可能的光線角度...04/16 12:40
2F→:所以可能的角度的確是有限的沒錯 即半徑 D 圓內的格點個數04/16 12:41
3F→:唔, 一樓修正一下: s/一個有理數/一對整數/04/16 12:42
1F推:Yj 是 indicator (指示變數)不是機率...04/12 21:19
2F→:指示變數不是 1 就是 0 只不過有分佈而已04/12 21:20
3F→:於是 (*) 就只是單純展開後拉期望值進和式裡04/12 21:20
4F→:(a) 把平方項化掉 E(Yj^2) = E(Yj) 因為 Yj 不是 1 就是 004/12 21:21
5F→:(b) 則是 E(YjYk) 而裡面只在都是 1 時是 104/12 21:22
6F→:於是就是這兩者同在這一天的機率04/12 21:23