well,i was trying this question:https://www.hackerrank.com/contests/may13/challenges/equal

and i am getting wrong answer for two test cases can someone tell me where this program is going wrong along with valid solution to it:

```
#include<stdio.h>
#include<algorithm>
using namespace std;
int main()
{
int t,l1=0,i,n;
long k=0,s1=0,s=0;
int arr[10001];
int arr1[200];
scanf("%d",&t);
while(t--)
{
scanf("%d",&n);
for(i=0;i<n;i++)
scanf("%d",&arr[i]);
sort(arr,arr+n);
s1=0;
for(i=0;i<n-1;i++)
{
if(arr[i]!=arr[i+1])
{
s=arr[i+1]-arr[i];
s1+=s;
if(i!=n-2)
arr[i+2]+=s1;
if(s>=5)
{
k+=s/5;
s=s%5;
}
if(s>=0)
{
k+=s/2;
s=s%2;
}
k+=s;
}
}
printf("%ld\n",k);
// arr1[l1++]=k;
k=0;
}
/* for(i=0;i<l1;i++)
printf("%d\n",arr1[i]);*/
return 0;
}
```

thankx in advance…