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

• 用double (277) frkstyc 2005-04-24 15:42:18
  • Re:用double (11) cpp050800448144 2005-04-24 18:50:17
    • Re:用double (6) frkstyc 2005-04-24 18:51:12
      • Re:用double (10) cpp050800448144 2005-04-24 20:00:16
        • Re:用double (7) cpp050800448144 2005-04-24 20:00:49
          • 少做几次除法就ac了 (11) frkstyc 2005-04-24 20:05:54
            • Re:为什么这样还不过? (268) cpp050800448144 2005-04-25 20:06:21
              • 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