reluct

#include <iostream>
#include <fstream>


using namespace std;

int main() {

    ifstream f("numere.in");

    int n, vector[1000], primacifra, ultimacifra, num, primacifra2, ultimacifra2, num2;

    f >> n;

    for (int i = 0; i < n; i++) {

        f >> vector[i];

    }

    for (int i = 0; i < n; i++) {

        ultimacifra = vector[i] % 10;

        num = vector[i];

        while (num >= 10) {

            num = num / 10;

        }

        primacifra = num;


        for (int j = 0; j < n; j++) {

            if (i != j) {

                ultimacifra2 = vector[j] % 10;

                num2 = vector[j];

                while (num2 >= 10) {

                    num2 = num2 / 10;

                }

                primacifra2 = num2;

                if (ultimacifra == ultimacifra2 && primacifra == primacifra2) {

                    cout << vector[i] << " " << vector[j];

                }


            }

        }

        cout << endl;

    }

    f.close();

    return 0;
}