#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=1e6+10,M=1e9+10;
int a[N],b[N];
signed main()
{
  int t;
  cin>>t;
  while(t--)
  {
    int n,ans=0,xx=M,c;
    cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i];
    for(int i=1;i<=n;i++)cin>>b[i];
    cin>>c;
    for(int i=1;i<=n;i++)
    {
		ans=ans+abs(a[i]-b[i]);
	    if((c-a[i])*(c-b[i])<=0)xx=min(xx,(int)1);
	    else xx=min(xx,1+abs(c-a[i]));
	}
	ans=ans+xx;
	cout<<ans<<'\n';
  }
}