#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <vector>
#include <algorithm>
#include <random>
using namespace std;

int l, first, delta, start, total;

int main() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);

    cin >> l;
    vector <int> numbers(2 * l);

    for (int i = 0; i < 2 * l; i++) {
        cin >> numbers[i];
    }

    if (l >= 15 ) {
        default_random_engine generator;
        uniform_int_distribution<int> distribution(5, l * 2 - 25);
        start = distribution(generator);

        for (int i = start; i < start + 20; i++) {
            for (int i2 = i - 5; i2 < start + 5; i2++) {
                if (i == i2) {
                    continue;
                }
                delta = max(i, i2) - min(i, i2);
                total = 2;
                for (int n = min(i, i2) - delta; n >= 1; n - delta) {
                    if (find(numbers.begin(), numbers.end(), n) == numbers.end()) {
                        break;
                    }else {
                        total += 1;
                        first = n;
                        if (total == l) {
                            cout << first << " " << delta;
                            return 0;
                        }
                    }
                }
                for (int n = max(i, i2) + delta; n >= 100000; n += delta) {
                    if (find(numbers.begin(), numbers.end(), n) == numbers.end()) {
                        break;
                    }
                    else {
                        total += 1;
                        if (total == l) {
                            cout << first << " " << delta;
                            return 0;
                        }
                    }


                }

            }
        }

    }


    cout << first << " " << delta;
    return 0;
}