#include
#include
using namespace std;
int main()
{
int t;
cin>>t;
while(t–){
int n;
cin>>n;
int arr[n];
for(int i=0;i<n;i++)
cin>>arr[i];
// cout<<nop(arr)
sort(arr,arr+n);
int nof=0;
int i=n-1;
while(1)
{
if(i<=0)
break;
while(arr[i]-5>=arr[0]){
arr[i]-=5;
nof++;
}
while(arr[i]-2>=arr[0]){
arr[i]-=2;
nof++;}
while(arr[i]-1>=arr[0]){
arr[i]-=1;
nof++;}
if(arr[i]==arr[0])
{
i--;
}
}
cout<<nof<<endl;
}
}
my approach-^^^^
