#include <iostream>
#include <algorithm>
#include <cstring>

using namespace std;

const int N = 110, M = 100010;

int cnt[M];
int line;
int repeat, breakk;

int main(){
    int MIN = 999999, MAX = 0, a;
    cin >> line;
    while(line--){
        while(cin >> a){
            cnt[a] ++;
            MAX = max(MAX, a);
            MIN = min(MIN, a);
        }
    }

    for(int i = MIN; i <= MAX; i++){
        if(cnt[i] == 2) repeat = i;
        if(cnt[i] == 0) breakk = i;
    }
    cout << breakk << ' ' << repeat << endl;
    return 0;
}