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作者 bbhands 在 PTT [ Grad-ProbAsk ] 看板的留言(推文), 共94則
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3F→:1.不會無窮,因為path的length是n-112/14 16:18
4F→:5.假設兩個component各有k, 6-k個點(0<k<6)12/14 16:19
5F→:則最大邊數和為10 (by complete graph & 配方法)12/14 16:20
6F→:22.f({1, 2, 3, 4, 5}) 代表 {f(1),f(2),f(3),f(4),f(5)}12/14 16:25
7F→:因此|f({1,2,3,4,5})|=3 代表{1,2,3,4}只有3個值被對到12/14 16:26
8F→:所以答案是 25*C(4,3)*3!12/14 16:26
9F→:31.n個相同物分成非空3堆的公式:取和n^2/12最接近的整數12/14 16:32
10F→:所以100/12=8.333 => 答案為812/14 16:35
1F→:X_3 = 0, 2, 4, 6代入07/08 23:56