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为什么runtime error,请教!!!!!#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
int t,n,i;
int a[30000];
scanf("%d",&t);
while(t--)
{
int sum=0;
scanf("%d",&n);
for(i=0;i<n;i++)
scanf("%d",&a[i]);
sort(a,a+n);
if(n%3==0)
{
while(n--)
{
sum+=a[n-2];
n=n-2;
}
}
printf("%d\n",sum);
if(n%3==1)
{
while(n--)
{
sum+=a[n-2];
n=n-2;
}
printf("%d\n",sum+a[0]);
}
}
return 0;
}
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