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#15947: DP想法


hshua (hshua)

a623. 3. Combination -- HP CodeWars 2007 | From: [125.227.237.177] | 發表日期: 2018-11-07 11:44

f(m,m)=1

f(n,m)=n/(n-m)*f(n-1, m)

 

n=10, m=5 ==>

F(0)=f(m,m)=1
F(1)=f(m+1,m)= (m+1)/1 * 1 = 6
F(2)=f(m+2,m)= (m+2)/2 * 6 = 21
...

#23710: Re:DP想法


gianhuaensh@gmail.com (沈登獻)

a623. 3. Combination -- HP CodeWars 2007 | From: [140.118.74.7] | 發表日期: 2020-12-11 15:57

謝謝

 
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