int lesson8()
{
    int n, k;
    cin >> n >> k;
    cout << endl;
    int a[1000];
    char b[10];
    for (int i = 0; i <= n; i++) {
        b[i] = i;
    }
    for (int i = 0; i < 2 * k; i++) {
        int k;
        cin >> k;
        a[i] = k;
    }
    //for (int i = 0; i < 2 * k; i++) {
        //cout << b[i] << " ";
    //}
    for (int i = 0; i <= n; i++) {
        for (int j = 0; j < 2 * k; j = j + 2) {
            if (a[j] == i) {

            }
        }
    }
    return 0;
}