#include<bits/stdc++.h>

using namespace std;

int main(){
	int n;
	cin >> n;
	long long s[10005] = {0}, s1[10005] = {0}, s2 = 0;
	long long a, b;
	while(n--){
		cin >> a >> b;
		if(a > b){
			s[a - b] ++;
		}else if(a < b){
			s1[b - a] ++;
		}else if(a == b){
			s2++;
		}
	}
	long long maxx = s2;
	for(int i = 0; i < 10004; i++){
		if(maxx < s[i]){
			maxx = s[i];
		}
		if(maxx < s1[i]){
			maxx = s1[i];
		}
	}
	cout << maxx;
	return 0;
}

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