#include "wiring.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const ll MOD = 998244353;
const ll INF = 1e18;
const ld EPS = 1e-12;
#define endl "\n"
#define sp <<" "<<
#define REP(i, a, b) for(ll i = a; i < b; i++)
#define dbg(x) cout << #x << " = " << x << endl
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define fast_io() ios_base::sync_with_stdio(false); cin.tie(NULL)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) ((ll)(x).size())
struct custom_hash {
static uint64_t splitmix64(uint64_t x) {
// http://xorshift.di.unimi.it/splitmix64.c
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const {
static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
template <typename Key, typename Value>
using hash_map = unordered_map<Key, Value, custom_hash>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// uniform_int_distribution<int>(a, b)(rng);
// shuffle(all(a), rng);
long long min_total_length(vector<int> r, vector<int> s) {
int n = r.size(), m = s.size(), t = n + m;
vector<bool> vis(1e9+1, false);
set<int> a(all(r)), b(all(s));
set<pair<int, int>> locs;
REP(i, 0, n)
locs.insert({r[i], 0});
REP(i, 0, m)
locs.insert({s[i], 1});
int ans = 0;
int lastR, lastB;
for (auto &[ind, type] : locs) {
if (!vis[ind]) {
vis[ind] = true;
int pair;
if (type == 0) {
lastR = ind;
auto it = lower_bound(all(b), ind);
if (it == b.end()) {
pair = lastB;
} else {
pair = *it;
b.erase(it);
lastB = pair;
}
}
else {
lastB = ind;
auto it = lower_bound(all(a), ind);
if (it == a.end()) {
pair = lastR;
} else {
pair = *it;
a.erase(it);
lastR = pair;
}
}
vis[pair] = true;
// cerr << ind sp pair << endl;
ans += abs(pair - ind);
}
}
return ans;
}
// signed main() {
// int n, m; cin >> n >> m;
// vector<int> a(n), b(m);
// REP(i, 0, n)
// cin >> a[i];
// REP(i, 0, m)
// cin >> b[i];
// cout << min_total_length(a, b);
// }
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