WA in BIRTHDAY GIFTS - LunchTime Div 3 (May)

help
1

I am getting WA (Wrong Answer) in this code. I passed all the sample test cases and also passed some self-created test cases. Please help!!

#include <bits/stdc++.h>
using namespace std;

int main() {
// your code goes here
int a=0;
int cases;
cin>>cases;

for(int i=0;i<cases;i++)
{
    int n,k;
    cin>>n>>k;
    int m=2*(k+1);
    if(m<=n)
    {
    int count1=0,count2=0;
    vector<long long> arr(n);
    
   
    int es=2*(k-1);
    for(long long j=0;j<n;j++)
      cin>>arr[j];
      
    sort(arr.begin(),arr.end(), greater<int>());
    
    for(int p=0;p<=es;p+=2)
    {
        count1=count1+arr[p];
        
        if(p!=es)
        count2=count2+arr[p+1];
        
        else
         count2=count2+arr[p+1]+arr[p+2];
         
    }
    
    if(count1>=count2)
      cout<<count1<<endl;
      
    else
      cout<<count2<<endl;
    
    }
    
    else
      cout<<a<<endl;
    
}
return 0;

}