#include <iostream>

#define MAXN 1010

using namespace std;

int n,ans,x[MAXN],y[MAXN];

void run()
{
	int i,hash_x[MAXN]={0},hash_y[MAXN]={0};
	for (i=0;i<n;i++)
	{
		hash_x[x[i]]++;
		hash_y[y[i]]++;
	}
	ans=0;
	for (i=0;i<=1000;i++)
	{
		if (hash_x[i]>ans)
			ans=hash_x[i];
		if (hash_y[i]>ans)
			ans=hash_y[i];
	}
}

void ini()
{
	int i;
	scanf("%d",&n);
	for (i=0;i<n;i++)
		scanf("%d%d",&x[i],&y[i]);
}

int main()
{
	freopen("stars.in","r",stdin);
	freopen("stars.out","w",stdout);
	ini();
	run();
	printf("%d",ans);
	return 0;
}