#include "wiring.h"
#include <algorithm>
#include <string.h>
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <set>
#include <map>
using namespace std;
#define N 100010
#define ff first
#define ss second
#define ll long long
#define pb push_back
#define mod 1000000007
#define pii pair <int, int>
#define sz(a) int(a.size())
// #pragma GCC target ("avx2")
// #pragma GCC optimization ("O3")
// #pragma GCC optimization ("unroll-loops")
ll bigmod(ll a,ll e) {if(e==0)return 1;ll x=bigmod(a*a%mod,e>>1);return e&1?x*a%mod:x;}
ll min_total_length(vector <int> r, vector <int> b) {
int n = sz(r);
int m = sz(b);
ll ans = 0;
if(n <= m) {
return 1;
for(int i = 0; i < n-1; i++) ans += b[i] - r[i];
for(int i = n; i < m; i++) ans += b[i] - r[n-1];
return ans;
} else {
for(int i = 1; i < m; i++) ans += b[i] - r[i-1];
for(int i = m; i < n; i++) ans += b[0] - r[i];
return ans;
}
}
