#include<bits/stdc++.h>
/*#include <cassert>
#include <cstdio>*/
#include "wiring.h"
using namespace std;
const long long MILLE=1000;
const long long INFINI=MILLE*MILLE*MILLE*MILLE*MILLE*MILLE,ZERO=0;
const int MAX_NB=200;
int nbRouge,nbBleu;
long long dyna[MAX_NB][MAX_NB];
int rouge[MAX_NB],bleu[MAX_NB];
long long calc_min(int posRouge,int posBleu) {
if (posRouge==nbRouge and posBleu==nbBleu) {
return ZERO;
}
if (posRouge>=nbRouge or posBleu>=nbBleu) {
return INFINI;
}
if (dyna[posRouge][posBleu]!=ZERO) {
return dyna[posRouge][posBleu];
}
long long val=INFINI;
val=min(val,calc_min(posRouge+1,posBleu+1));
val=min(val,calc_min(posRouge,posBleu+1));
val=min(val,calc_min(posRouge+1,posBleu));
val+=(long long)abs((long long)rouge[posRouge]-(long long)bleu[posBleu]);
dyna[posRouge][posBleu]=val;
return val;
}
long long min_total_length(vector<int> r, vector<int> b) {
nbRouge=r.size();
nbBleu=b.size();
for (int i=0;i<nbRouge;i++) {
rouge[i]=r[i];
}
for (int i=0;i<nbBleu;i++) {
bleu[i]=b[i];
}
return calc_min(0,0);
}
/*
int main() {
int n, m;
assert(2 == scanf("%d %d", &n, &m));
vector<int> r(n), b(m);
for(int i = 0; i < n; i++)
assert(1 == scanf("%d", &r[i]));
for(int i = 0; i < m; i++)
assert(1 == scanf("%d", &b[i]));
long long res = min_total_length(r, b);
printf("%lld\n", res);
return 0;
}*/
