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

int main() {
    int n;
    cin >> n;
    
    int rodendni[13][32];
    for(int i = 1; i <= 12; i++) {
        for(int j = 1; j <= 31; j++) {
            rodendni[i][j] = 0;
        }
    }
    for(int i = 0; i < n; i++) {
        int x, y;
        cin >> x >> y;
        rodendni[y][x] = 1;
    }
    int max_brojac = 0;
    vector<int> meseci;
    for(int mesec = 1; mesec <= 12; mesec++) {
        int brojac = 0;
        for(int den = 1; den <= 31; den++) {
            if(rodendni[mesec][den] == 1) {
                brojac++;
            }
        }
        if(brojac > max_brojac) {
            max_brojac = brojac;
            meseci.clear();
            meseci.push_back(mesec);
        }
        else if(brojac == max_brojac) {
            meseci.push_back(mesec);
        }
    }
    for(int i = 0; i < meseci.size(); i++) {
        cout << meseci[i] << endl;
    }
 
    
    return 0;
}