#include<iostream>

using namespace std;

const int N = 100010;
int a[N];

int main(){
    int n, max = -99999, min = 100010;
    cin >> n;
    while(n --){
        int t;
        while(cin >> t){
            if(t < min) min = t;
            if(t > max) max = t;
            a[t] ++;
        }
    }
    int c, d;
    for(int i = min; i <= max; i ++){
        if(!a[i]) d = i;
        if(a[i] == 2) c = i;
    }
    printf("%d %d\n", d, c);
    return 0;
}