sim 2021 III 3

#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("bac.in");
bool isInFile[100];
int out[2];

int main() {
    for (int x; fin >> x;) {
        if (x < 100) {
            isInFile[x] = true;
        }
    }
    int written = 0;
    for (int a = 9; a; a--) {
        for (int b = a - 1; b; b--) {
            int nr = a * 10 + b;
            if (!isInFile[nr]) {
                out[written] = nr;
                written++;
            }
            if (written == 2) {
                cout << out[0] << ' ' << out[1] << endl;
                return 0;
            }
        }
    }
    cout << "nu exista" << endl;
    return 0;
}