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Re:为什么这样还不过?

Posted by cpp050800448144 at 2005-04-25 20:06:21 on Problem 2249
In Reply To:少做几次除法就ac了 Posted by:frkstyc at 2005-04-24 20:05:54

#include<iostream.h>
void main()
{
	double n,k,sum,sum1;
	while(1)
	{
		sum=1,sum1=1;
		cin>>n>>k;
		if(n==0&&k==0)
			break;
		if(k>n/2)
			k=n-k;
		for(double i=1;i<=k;i++)
		{
			sum*=n+1-i;
			sum1*=i;
		}
		sum/=sum1;
		cout<<sum<<endl;
	}
}

Followed by:

Re:为什么这样还不过? (310) 00448067 2005-04-25 20:57:31
- Re:为什么这样还不过? (8) 00448067 2005-04-25 20:58:02
  - Re:为什么这样还不过? (334) 00448067 2005-04-25 21:01:33
    - Re:为什么这样还不过? (372) cpp050800448144 2005-04-25 21:28:03
      - Re:为什么这样还不过? (312) cpp050800448144 2005-04-25 21:28:33
        Re:为什么这样还不过? (385) fmlwlh 2006-03-28 15:53:02

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