#include <iostream>
#include <algorithm>
#include <cstring>
#include <sstream>
#include <map>
#include <queue>
#include <set>
#include <vector>
#include <stack>
#include <cstdio>
#include <cmath>
#include <bitset>
#define mk make_pair
#define pb push_back
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> pos;

const ll MOD = 1234567, N = 300010, dx[4] = { -1,1,0,0 }, dy[4] = { 0,0,-1,1 }, MIN = -72340172838, MAX = 72340172838;
const int S = 60;
ll mn(ll a, ll b) {
	if (a == -1)return b;
	if (b == -1)return a;
	return min(a, b);
}
static ll gcd(ll v1, ll v2) {
	if (v1 == 0)return v2; if (v2 == 0)return v1; if (v2 > v1)return gcd(v2%v1, v1); return gcd(v1%v2, v2);
}

ll pw(ll v1, ll v2) {
	ll v3 = 1;
	while (v2 > 0) {
		if (v2 % 2)v3 = (v3*v1) % MOD;
		v1 = (v1*v1) % MOD;
		v2 /= 2;
	}
	return v3;
}

ll n, a[N], dp[N],bt1[N],bt2[N],x[N],y[N];

void ad(ll v1, ll v2,ll bt[]) {
	while (v1 < N) {
		bt[v1] = mn(bt[v1],v2);
		v1 += v1 & -v1;
	}
}

int sm(ll v1,ll bt[]) {
	ll v2 = MAX;
	while (v1 > 0) {
		v2 =mn(bt[v1],v2);
		v1 -= v1 & -v1;
	}
	return v2;
}


int main() {
	cin >> n;
	memset(bt1, -1, sizeof(bt1));
	memset(bt2, -1, sizeof(bt2));
	for (int i = 1; i <= n; i++)scanf("%d", a + i);
	for (int i = 1; i <= n; i++)scanf("%d", x + i);
	for (int i = 1; i <= n; i++)scanf("%d", y + i);

	for (int i = 1; i <= n; i++) {
		ll xi = upper_bound(x + 1, x + i + 1, a[i]) - x - 1;
		ad(i, dp[i - 1] - x[i] + y[i], bt1);
		ad(n + 1 - i, dp[i - 1] + x[i] + y[i], bt2);
		dp[i] = MAX;
		ll v1 = sm(xi, bt1), v2 = sm(n + 1 - (xi + 1), bt2);
		dp[i] = mn(dp[i],a[i] + v1);
		dp[i] = mn(dp[i], v2 - a[i]);
	}
	cout << dp[n] << endl;


	return 0;
}