#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.14159265359;
ll inf=1001000000000;
ll mod=1000000007;
int main(){
    ll n;
    cin >> n;
    vector<ll>a(n),b(n);
    for (ll i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    for (ll i = 0; i < n; i++)
    {
        cin >> b[i];
    }
    if (n==1)
    {
        cout <<0 << endl;
        return 0;
    }
    ll left=0,right=inf;
    ll ans=inf;
    while (right-left>1)
    {
        ll mid=(right+left)/2;
        bool ok=true;
        vector<ll>x;
        for (ll i = 0; i < n; i++)
        {
            vector<ll>c;
            if (a[i]>=mid)
            {
                c.push_back(a[i]);
            }
            if (b[i]>=mid)
            {
                c.push_back(b[i]);
            }
            if ((a[i]+b[i])/2>=mid)
            {
                c.push_back((a[i]+b[i])/2);
            }
            if (c.empty())
            {
                ok=false;
                break;
            }
            sort(c.begin(),c.end());
            x.push_back(c[0]);
        }
        if (!ok)
        {
            right=mid;
            continue;
        }else{
            left=mid;
        }
        sort(x.begin(),x.end());
        if (x[x.size()-1]-x[0]<ans)
        {
            ans=x[x.size()-1]-x[0];
        }
    }
    cout << ans << endl;
}