#include <bits/stdc++.h>
#define SELECTER(_1,_2,_3,SELECT,...) SELECT
#define rep1(i,n) for(int i=0;i<(int)n;++i)
#define rep2(i,a,n) for(int i=(int)a;i<(int)n;++i)
#define rep(...) SELECTER(__VA_ARGS__,rep2,rep1)(__VA_ARGS__)
#define RSELECTER(_1, _2, _3, RSELECT, ...) RSELECT
#define rrep1(i,n) for(int i=(int)n-1;i>=0;--i)
#define rrep2(i,a,n) for(int i=(int)n-1;i>=(int)a;--i)
#define rrep(...) RSELECTER(__VA_ARGS__, rrep2, rrep1)(__VA_ARGS__)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define fi first
#define se second
#define PrintR LogOutput
#ifdef _DEBUG
#define Log(...) LogOutput(__VA_ARGS__)
#else
#define Log(...)
#endif
using namespace std;
using ll=long long;
using pii=pair<int,int>;
using pll=pair<long long,long long>;
using pdd=pair<long double,long double>;
using veci=vector<int>;
using vecpii=vector<pair<int,int>>;
using vecll=vector<long long>;
using vecpll=vector<pair<long long,long long>>;
using vecpdd=vector<pair<long double,long double>>;
using vecs=vector<string>;
using vecb=vector<bool>;
using vecd=vector<long double>;
template<class T> inline bool chmax(T& a,T b){if(a<b) {a=b;return true;} return false;}
template<class T> inline bool chmin(T& a,T b){if(a>b) {a=b;return true;} return false;}

constexpr ll INF=numeric_limits<ll>::max() / 4;
constexpr ll MOD=998244353;
using tp=tuple<int,int,int>;
using tpll=tuple<ll,ll,ll>;

template<typename T>
T LogOutput(T a, bool b = true){
	if(b) cout << a << endl;
	return a;
}
template<typename... Args>
void LogOutput(Args&&... args){
	stringstream ss;
	((ss << LogOutput(args, false) << ' '), ...);
	cout << ss.str().substr(0, ss.str().length() - 1) << endl;
}
template<typename T>
void LogOutput(vector<T>& data){
	for(int i = 0 ; i < data.size() ; ++i){
		cout << LogOutput(data[i], false) << " \n"[i == data.size() - 1];
	}
}
template<typename T>
void LogOutput(vector<vector<T>>& data){
	for(auto d : data) LogOutput(d);
}

bool f(vector<veci>& g, int k, int p){
	int n = g.size();
	veci dp(n, 1e6);
	dp[0] = 0;
	priority_queue<pii, vecpii, greater<pii>> q;
	q.emplace(0, 0);
	int cnt = 0;
	while(q.size()){
		auto [c, v] = q.top(); q.pop();
		if(dp[v] < c) continue;
		rep(i, n) if(i != v){		
			if(chmin(dp[i], dp[v] + (g[v][i] - 1) / p)){
				q.emplace(dp[i], i);
			}
		}
	}
	return dp[n - 1] <= k;
}

int main(){
	ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	int n, k;cin>>n>>k;
	veci x(n + 2), y(n + 2);
	cin>>x[0]>>y[0]>>x[n + 1]>>y[n + 1];
	rep(i, n) cin>>x[i + 1]>>y[i + 1];
	vector g(n + 2, veci(n + 2));
	rep(i, n + 2) rep(j, n + 2){
		g[i][j] = abs(x[i] - x[j]) + abs(y[i] - y[j]);
	}
	int l = 0, r = 3e5 + 1;
	while(r - l > 1){
		int mid = (l + r) / 2;
		if(f(g, k, mid)) r = mid;
		else l = mid;
	}
	cout<<r<<endl;
}