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Re:直接用组合公式就一步

Posted by softmind at 2006-05-06 15:39:46 on Problem 2249
In Reply To:直接用组合公式就一步 Posted by:gemenhao at 2006-04-01 19:41:00 
> __int64 cnk(__int64 n, __int64 k)
> {
> 	return k ? cnk(n-1,k-1)*n/k:1;
> }
这样的话，递归栈肯定溢出！
如果不溢出，效率也不会高！
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