codeforce - balanced array

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fast()(ios_base::sync_with_stdio(0),cin.tie(NULL));
int main()
{
    fast()
    ll t ;
    cin >> t;
    while (t--)
    {
        ll n;
        cin>>n;
        ll x=n/2;
        if(x%2==1)
        {
            cout<<"NO"<<endl;
        }
        else
        {
            ll sum=0,i,j=1;
            cout<<"YES"<<endl;
            for(i=0;i<n;i++)
            {
                if(i<n/2)
                {
                    cout<<2*(i+1)<<" ";
                    sum+=(2*(i+1));
                }
                else
                {
                    if(i==(n-1))
                    {
                        cout<<sum<<endl;
                    }
                    else
                    {
                        cout<<j<<" ";
                        sum-=j;
                        j+=2;
                    }
                }
            }

        }
    }
}