11/65

#include <iostream>
#include <cstring>
using namespace std;

typedef struct
{
    int x, y;
} PUNCT;

int main()
{
    PUNCT p[100];
    int fr[100] = {};//il fac pe fr 0
    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> p[i].x >> p[i].y;

    int maxi = 0;
    for (int i = 0; i < n; i++)
    {
        fr[p[i].y]++;
        if (maxi < p[i].y)
            maxi = p[i].y;
    }

    int maxifr = 0;
    for (int i = 0; i < maxi; i++)
        if (maxifr < fr[i])
            maxifr = fr[i];

    cout << maxifr;
    return 0;
}