#include <bits/stdc++.h>
#include <ctime>
using namespace std;
#define pb push_back
#define in insert
#define lb lower_bound
#define F first
#define S second
#define sz size()
#define int long long
#define all(v) v.begin(),v.end()
#define FOR1(x, n) for(int j = x; j <= n; j ++)
#define FOR(x, n, m, d) for(int x = n; x <= m; x += d)
#define FORR(x, n, m, d) for(int x = n; x >= m; x -= d)
#define nikita ios_base::sync_with_stdio(0), cin.tie(0);
const int N = 3e5+5;
int n,m,k,sum=0,x,y, ans, r, cnt, l, mod = 1e9+7, dp[N], a[N], b[N];
string s, str;
void solve(){
srand(time(0));
cin >> n >> m;
vector<pair<int, int>>v;
multiset<int>st;
FOR(i, 1, n, 1)cin >> a[i] >> b[i], v.pb({a[i], b[i]});
sort(all(v));
FOR(i, 1, n, 1){
a[i] = v[i-1].F, b[i] = v[i-1].S;
}
ans = 1e18;
FOR(i, 1, n, 1){
FOR(j, i+1, min(n, i+5000), 1){
ans = min(ans, abs(a[i]-a[j]) + abs(b[i]-b[j]));
}
}
cout << ans;
}
signed main(){
nikita
int tt = 1;
if(!tt)cin >> tt;
FOR(i, 1, tt, 1)solve();
}
