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此题与2479不是一回事

Posted by kurtcq at 2008-10-03 20:31:54 on Problem 2593
这道题题目描述与2479几乎一样,但从ac的代码来看根本不是一回事。首先2593网上贴出的ac代码连2479的sample input都不能过。从网上ac的代码来推测本题意图发现此题是一个毫无意义的水题(有些水题还是有些意义的)。
下面是我ac的代码(从我代码可以清晰看出本题实际意图)
#include <iostream>
#include <stdio.h>
using namespace std;
int cmp ( const void *a , const void *b )
{
	return *(int *)b - *(int *)a;
}
int main()
{
	int sum,n,flag,i,a[100010];
	while (1)
	{
		sum=0;
		flag=0;
		scanf("%d",&n);
		if (n==0)
			break;
		for (i=0;i<n;i++)
		{
			scanf("%d",&a[i]);
			if (a[i]>0)
			{
				flag++;
				sum+=a[i];
			}
		}
		if (flag==0||flag==1)
		{
			qsort(a,n,sizeof(a[0]),cmp);
			printf("%d\n",a[0]+a[1]);
		}
		else printf("%d\n",sum);
	}
	return 0;
}

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