#include<bits/stdc++.h>
using namespace std;
#define S second
#define F first
#define ll long long
//#define int long long
//#pragma GCC optimize("Ofast, unroll-loop")
//#pragma GCC target("avx,avx2")
#pragma GCC optimize("O3")
#define init(arr,val) memset(arr,val,sizeof arr)
const int inf=0x3f3f3f3f;
const ll inff=0x3f3f3f3f3f3f3f3f;
const int X=1000000007;
//const int X=998244353;
int a[6005], b[3005], c[3005];
int main(){
ios::sync_with_stdio(false), cin.tie(nullptr);
int n; cin >> n;
for(int i=1 ; i<=n*2 ; i++) cin >> a[i];
for(int i=1 ; i<=n ; i++) cin >> b[i];
for(int i=1 ; i<=n ; i++) cin >> c[i];
sort(b+1,b+n+1), sort(c+1,c+n+1);
int ans=inf;
for(int i=1 ; i<=n+1 ; i++){
vector<int> v[2];
for(int j=1 ; j<i ; j++) v[0].push_back(a[j]);
for(int j=i ; j<=i+n ; j++) v[1].push_back(a[j]);
for(int j=i+n+1 ; j<=n*2 ; j++) v[0].push_back(a[j]);
sort(v[0].begin(),v[0].end()), sort(v[1].begin(),v[1].end());
int temp=0;
for(int j=1 ; j<=n ; j++) temp=max(temp,abs(v[0][j-1]-b[j]));
for(int j=1 ; j<=n ; j++) temp=max(temp,abs(v[1][j-1]-c[j]));
ans=min(ans,temp);
temp=0;
for(int j=1 ; j<=n ; j++) temp=max(temp,abs(v[0][j-1]-c[j]));
for(int j=1 ; j<=n ; j++) temp=max(temp,abs(v[1][j-1]-b[j]));
ans=min(ans,temp);
}
cout << ans << '\n';
return 0;
}
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