#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")
#include <cstdlib>
#include <cctype>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <vector>
#include <string>
#include <iostream>
#include <sstream>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <fstream>
#include <numeric>
#include <iomanip>
#include <bitset>
#include <list>
#include <stdexcept>
#include <functional>
#include <utility>
#include <ctime>
#include <cassert>
using namespace std;
typedef long long LL;
typedef unsigned long long ULL;
#define MEM(a,b) memset((a),(b),sizeof(a))
const LL INF = 1e9 + 7;
const int N = 5e2 + 10;
int a[N][N];
int d[N][N];
pair<int, int> vp[N];
void floyd(int n)
{
	for (int k = 0; k <= n; k++)
	{
		for (int i = 0; i <= n; i++)
		{
			for (int j = 0; j <= n; j++)
				a[i][j] = min(a[i][j], a[i][k] + a[k][j]);
		}
	}
}
inline int dis(int i, int j)
{
	return abs(vp[i].first - vp[j].first) + abs(vp[i].second - vp[j].second);
}
int main()
{
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	int n, k;
	scanf("%d%d", &n, &k);
	scanf("%d%d%d%d", &vp[0].first, &vp[0].second, &vp[n + 1].first, &vp[n + 1].second);
	for (int i = 1; i <= n; i++)
		scanf("%d%d", &vp[i].first, &vp[i].second);
	n++;
	for (int i = 0; i <= n; i++)
	{
		for (int j = 0; j <= n; j++)
			d[i][j] = dis(i, j);
	}
	int l = 1, r = dis(0, n);
	int ans = r;
	while (l <= r)
	{
		int mid = (l + r) / 2;
		for (int i = 0; i <= n; i++)
		{
			for (int j = 0; j <= n; j++)
			{
				int d = ::d[i][j] - mid;
				d = max(0, d);
				a[i][j] = (d + mid - 1) / (mid);
			}
		}
		floyd(n);
		if (a[0][n] <= k) ans = mid, r = mid - 1;
		else l = mid + 1;
	}
	printf("%d\n", ans);
	return 0;
}