// In the name of Allah
#include <bits/stdc++.h>
#include "railroad.h"
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef complex<ld> cld;
#define all(x) (x).begin(),(x).end()
#define len(x) ((ll) (x).size())
#define F first
#define S second
#define pb push_back
#define sep ' '
#define endl '\n'
#define Mp make_pair
#define kill(x) cout << x << '\n', exit(0)
#define set_dec(x) cout << fixed << setprecision(x);
#define file_io(x,y) freopen(x, "r", stdin); freopen(y, "w", stdout);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxn = 2e5 + 7;
const ll oo = 1e18 + 4;
int n;
ll A1[maxn], A2[maxn];
ll plan_roller_coaster(vector<int> s, vector<int> t) {
n = len(s);
for (int i = 0; i < n; i++) {
A1[i] = s[i]; A2[i] = t[i];
}
A1[n] = oo; A2[n] = -oo; n++;
ll ans = 0;
sort(A1, A1 + n); sort(A2, A2 + n);
for (int i = 1; i < n - 1; i++) {
ans += max(0ll, A2[i] - A1[i]);
}
return ans;
}
