#include <iostream>
#include <fstream>
using namespace std;
int v[100000],n,i,k,j;
int main()
{
    ifstream f("elmaj.in");
    ofstream g("elmaj.out");
    f>>n;
    for (i=1;i<=n;i++)
    {
        k=0;
        for (j=1;j<=n;j++)
        {
            f>>v[j];
            if (v[j]==i) k++;
        }
        if (k>=n/2+1) g<<i<<" "<<k;
    }
    return -1;
}