import java.util.*;
public class Test3 {

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        int input = Integer.parseInt(reader.nextLine());
        int longer =1;
        int longest =1;
        String[] myArr = new String[input];
        myArr[0] = reader.nextLine();
        for (int i = 1; i <input ; i++) {
            myArr[i] = reader.nextLine();
            if(myArr[i].equals(myArr[i-1])){
                longer++;
                if(longer>longest){
                    longest=longer;
                }
            }else{
                longer=1;
            }
        }
        System.out.println(longest);
    }
}