#include <iostream>
#include <map>
#include <string>

using namespace std;

int max_votes(const map<string, int> &votes)
{
    int m_votes = 0;

    for (auto [key, value] : votes) {
        m_votes = max(m_votes, value);
    }
    
    return m_votes;
}

int main(void)
{
    int n;
    cin >> n;

    map<string, int> votes;

    while (n--) {
        string name;
        cin >> name;
        votes[name]++;
    }

    cout << max_votes(votes) << endl;
    
    return 0;
}