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## Re:那位大牛能解释这个问题，俩个非常相似的程序，一个ac（0ms），一个tle！！！

Posted by zysaaa at 2010-11-25 14:10:33 on Problem 1942
In Reply To:那位大牛能解释这个问题，俩个非常相似的程序，一个ac（0ms），一个tle！！！ Posted by:2004huangyimin at 2006-04-25 14:08:21
```> Source
>
> Problem Id:1942  User Id:2004huangyimin
> Memory:48K  Time:1015MS
> Language:C++  Result:Time Limit Exceed
>
> Source
>
> #include < iostream >
> using namespace std;
> unsigned int com (unsigned int n,unsigned int m)
> {
> 	double i;
> 	double result(1);
> 	if ( n >= m - n ){ n = m-n; }
> 	for ( i = m;i >= m-n+1;i-=1 )
> 	{
> 		result *= (i / (i - (m - n)));
> 	}
> 	return result;
> }
> int main()
> {
> 	unsigned int n,m;
> 	while (1)
> 	{
> 		scanf("%d%d",&n,&m);
> 		if ( n==0 && m==0 ){ break; }
> 		printf("%d\n",com (n,m+n));
> 	}
> 	return 0;
> }
>
> Source
>
> Problem Id:1942  User Id:2004huangyimin
> Memory:56K  Time:0MS
> Language:C++  Result:Accepted
>
> Source
>
> #include < iostream >
> using namespace std;
> double com (double n,double m)
> {
> 	double i;
> 	double result(1);
> 	if ( n >= m - n ){ n = m-n; }
> 	for ( i = m;i >= m-n+1;i-=1 )
> 	{
> 		result *= (i / (i - (m - n)));
> 	}
> 	return result;
> }
> int main()
> {
> 	double n,m;
> 	while (1)
> 	{
> 		scanf("%lf%lf",&n,&m);
> 		if ( n==0 && m==0 ){ break; }
> 		printf("%.0lf\n",com (n,m+n));
> 	}
> 	return 0;
> }
>
```

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