#include "wiring.h"
#include <bits/stdc++.h>
using namespace std;
#define LL long long
const LL INF = 1e9;
const LL LINF = 1e18;
const int N = 2e3+10;
LL dp[N][N][2][2];
int n,m;
vector<int>R,B;
LL solve(int i,int j,int t1,int t2){
if(i==n-1&&j==m-1&&t1&&t2)
return 0;
if(dp[i][j][t1][t2]!=-1)
return dp[i][j][t1][t2];
dp[i][j][t1][t2] = LINF;
if(t1&&i<n-1)
dp[i][j][t1][t2] = min(dp[i][j][t1][t2],solve(i+1,j,0,t2));
if(t2&&j<m-1)
dp[i][j][t1][t2] = min(dp[i][j][t1][t2],solve(i,j+1,t1,0));
dp[i][j][t1][t2] = min(dp[i][j][t1][t2],solve(i,j,1,1)+abs(R[i]-B[j]));
return dp[i][j][t1][t2];
}
long long min_total_length(std::vector<int> r, std::vector<int> b) {
n = r.size(),m = b.size();
memset(dp,-1,sizeof(dp));
R = r;B = b;
return solve(0,0,0,0);
}
