#include "wiring.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, m;
long long min_total_length(std::vector<int> r, std::vector<int> b) {
n = r.size();
m = b.size();
if (r.back() < b.front()) {
ll ans = 0;
int rfocal = r.back();
int bfocal = b.front();
int i = 0;
while (i < n && i < m) {
int rpoint = r[n - 1 - i];
int bpoint = b[i];
if (abs(rpoint - bpoint) < abs(rpoint - bfocal) + abs(bpoint - rfocal)) {
ans += abs(rpoint - bpoint);
i++;
}
else
break;
}
for (int cur = i; cur < n; cur++)
ans += abs(r[n - 1 - i] - bfocal);
for (int cur = i; cur < m; cur++)
ans += abs(b[i] - rfocal);
return ans;
}
return -1;
}
