Problem: 3637  User: luchenqun 
Memory: 320K  Time: 375MS 
Language: C++  Result: Accepted 

#include<iostream>
#include<RP>//O(∩_∩)O哈哈~我加上这句就过了
#include<algorithm>
#define MAX 20008
using namespace std;

int a[MAX];

int main()
{
	int T,n,sum,i;
	cin>>T;
	while(T--)
	{
		sum=0;
		cin>>n;
		for(i=0;i<n;i++)
			cin>>a[i];
		sort(a,a+n);
		for(i=n-3;i>=0;i-=3)
			sum +=a[i];
		cout<<sum<<endl;
	}
	return 0;
}

• cin完全可以不超时的。上代码 (480) buaabarty 2011-04-12 12:41:48