#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
int test(vector<pair<int, int>> v, int D){
int cnt = 1;
vector<tuple<int, int, int, int>> ill = {{v[0].f, v[0].sc, 0, D}};
v.erase(v.begin());
while(!ill.empty()){
vector<pair<int, int>> _v;
vector<tuple<int, int, int, int>> _ill;
swap(_v, v);
for(auto [x, y]: _v){
int mn = 2e9, d = -1;
int A = 0, B = 0;
for(auto [a, b, t, dd]: ill){
if((a+b == x+y || a-b == x-y) && abs(a-x) < mn && abs(a-x) >= t){
if(a < x) A++;
else B++;
if(dd == 0 && y < b) continue;
if(dd == 1 && x < a) continue;
if(dd == 2 && y > b) continue;
if(dd == 3 && x > a) continue;
mn = abs(a-x);
if(dd == 0 || dd == 2) d = x < a ? 1:3;
if(dd == 1 || dd == 3) d = y < b ? 0:2;
}
/*if(b == y && abs(a-x) < mn && abs(a-x) >= t && dd == 1 && a < x) mn = abs(a-x), d = 3;
if(b == y && abs(a-x) < mn && abs(a-x) >= t && dd == 3 && a > x) mn = abs(a-x), d = 1;
if(a == x && abs(b-y) < mn && abs(b-y) >= t && dd == 0 && b < y) mn = abs(b-y), d = 2;
if(a == x && abs(b-y) < mn && abs(b-y) >= t && dd == 2 && b > y) mn = abs(b-y), d = 0;*/
}
if(min(A, B) > 0) exit(-1);
if(d != -1) _ill.pb({x, y, mn, d}), cnt++;
else v.pb({x, y});
}
swap(ill, _ill);
}
return cnt;
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n; cin >> n;
vector<pair<int, int>> v(n);
for(auto &[x, y]: v) cin >> x >> y;
cout << max(max(test(v, 0), test(v, 1)), max(test(v, 2), test(v, 3))) << "\n";
}
