#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 3e5 + 7;
int n;
int a[2 * N], b[N], c[N];
int l[2 * N], r[2 * N], lc[2 * N], rc[2 * N];
pair<int, int> pref[2 * N], suff[2 * N], mid_pref[2 * N], mid_suff[2 * N];
pair<int, int> inter(pair<int, int> a, pair<int, int> b) {
return {max(a.first, b.first), min(a.second, b.second)};
}
bool check(int mid) {
{
int ptrl = 1, ptrr = 0;
for (int i = 1; i <= n; ++i) {
while (ptrr <= n && b[ptrr + 1] <= a[i] + mid) ++ptrr;
while (ptrl <= n && b[ptrl] < a[i] - mid) ++ptrl;
l[i] = ptrl;
r[i] = ptrr;
}
for (int i = 2 * n; i >= n + 1; --i) {
while (ptrr <= n && b[ptrr + 1] <= a[i] + mid) ++ptrr;
while (ptrl <= n && b[ptrl] < a[i] - mid) ++ptrl;
l[i] = ptrl;
r[i] = ptrr;
}
}
{
int ptrl = 1, ptrr = 0;
for (int i = 1; i <= n; ++i) {
while (ptrr <= n && c[ptrr + 1] <= a[i] + mid) ++ptrr;
while (ptrl <= n && c[ptrl] < a[i] - mid) ++ptrl;
lc[i] = ptrl;
rc[i] = ptrr;
}
for (int i = 2 * n; i >= n + 1; --i) {
while (ptrr <= n && c[ptrr + 1] <= a[i] + mid) ++ptrr;
while (ptrl <= n && c[ptrl] < a[i] - mid) ++ptrl;
lc[i] = ptrl;
rc[i] = ptrr;
}
}
bool ret = 0;
for (int it = 0; it < 2; ++it) {
pref[0] = {-1e9, 1e9};
int cnt = 0;
for (int i = 1; i <= 2 * n; ++i) {
++cnt;
pref[i] = inter(pref[i - 1], {lc[i] - cnt, rc[i] - cnt});
}
suff[2 * n + 1] = {-1e9, 1e9};
cnt = 0;
for (int i = 2 * n; i >= 1; --i) {
++cnt;
suff[i] = inter(suff[i + 1], {lc[i] - cnt, rc[i] - cnt});
}
mid_pref[n] = {-1e9, 1e9};
cnt = 0;
for (int i = n + 1; i <= 2 * n; ++i) {
++cnt;
mid_pref[i] = inter({mid_pref[i - 1].first - 1, mid_pref[i - 1].second - 1}, {l[i], r[i]});
}
mid_suff[n + 1] = {-1e9, 1e9};
cnt = 0;
for (int i = n; i >= 1; --i) {
++cnt;
mid_suff[i] = inter({mid_suff[i + 1].first - 1, mid_suff[i + 1].second - 1}, {l[i], r[i]});
}
for (int i = 1; i <= n; ++i) {
pair<int, int> f1 = inter(pref[i - 1], {suff[i + n].first - (i - 1), suff[i + n].second - (i - 1)});
pair<int, int> f2 = inter(mid_suff[i], {mid_pref[i + n - 1].first - (n - i + 1), mid_pref[i + n - 1].second - (n - i + 1)});
if (f1.first <= f1.second && f2.first <= f2.second) {
ret = 1;
}
}
for (int i = 1; i <= n; ++i) swap(b[i], c[i]);
for (int i = 1; i <= 2 * n; ++i) swap(l[i], lc[i]);
for (int i = 1; i <= 2 * n; ++i) swap(r[i], rc[i]);
}
return ret;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cin >> n;
for (int i = 1; i <= 2 * n; ++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 low = 0, high = 1e9, sol = 0;
while (low <= high) {
int mid = (low + high) / 2;
if (check(mid)) {
sol = mid;
high = mid - 1;
} else {
low = mid + 1;
}
}
cout << sol << "\n";
return 0;
}
