#include "bits/stdc++.h"
using namespace std;
#ifdef Nero
#include "Deb.h"
#else
#define debug(...)
#endif
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
vector<int> a(n * 2);
vector<int> b(n), c(n);
for (int i = 0; i < n * 2; ++i) {
cin >> a[i];
}
for (int i = 0; i < n; ++i) {
cin >> b[i];
}
for (int i = 0; i < n; ++i) {
cin >> c[i];
}
sort(b.begin(), b.end());
sort(c.begin(), c.end());
int ans = INT_MAX;
for (int rep = 0; rep < 2; ++rep) {
for (int f = 0; f <= n; ++f) {
vector<int> v1, v2;
for (int i = 0; i < n * 2; ++i) {
if (i >= f && i < f + n) {
v1.push_back(a[i]);
} else {
v2.push_back(a[i]);
}
}
int res = 0;
sort(v1.begin(), v1.end());
sort(v2.begin(), v2.end());
for (int i = 0; i < n; ++i) {
res = max(res, abs(v1[i] - b[i]));
res = max(res, abs(v2[i] - c[i]));
}
ans = min(ans, res);
}
swap(b, c);
}
cout << ans << '\n';
return 0;
}
