#include<bits/stdc++.h>
#define int long long
using namespace std;
const int inf=0x3f3f3f3f;
const int f=1e9+7;
const int N=2e5+10;
int a[N],b[N];
void solve()
{
    int n;
    cin >> n;
    int s1=0,s2=0,b1=0,b2=0;
    for(int i=1;i<=n;i++){
        cin >> a[i];
        s1=max(s1,a[i]);
        s2=min(s2,a[i]);
    }
    for(int i=1;i<=n;i++){
        cin >> b[i];
        b1=max(b1,b[i]);
        b2=min(b2,b[i]);
    }
    int c; cin >> c;
    int sum=0;
    int pos=0;//c是否在a[i]和b[i]之间
    for(int i=1;i<=n;i++){
        if((a[i]>=c && c<=b[i]) || (a[i]<=c && c>=b[i])) pos=1; 
        //若c介于a[i]和b[i]之间，则最后加一即可
        //否则，需要计算最小差值
        sum+=abs(a[i]-b[i]);
    }
    s1=max(s1,b1);
    s2=min(s2,b2);
    if(pos){
        cout << sum + 1 << '\n';
    }else {
        cout << sum + 1 + min(abs(s1-c),abs(s2-c)) << '\n';
    }
}
void close(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}
signed main ()
{
    close();int T = 1;
    cin >> T;
    while(T--) solve();
    return 0;
} //