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当k>n/2的时候取k=n-kIn Reply To:为什么老超时??? Posted by:00448707 at 2005-04-24 11:13:41 > #include<iostream.h> > void main() > { > long double n,k; > long double s; > for(;;) > { > s=1; > cin>>n>>k; > if(n==0&&k==0) break; > for(long double i=1;i<=k;i++) > { > s*=n+1-i; > s/=i; > } > cout<<s<<endl; > } > } Followed by:
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