int n; cin >> n;

for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n - i; j++) {
        cout << " ";
    }
    for (int j = 1; j <= i * 2 - 1; j++) {
        cout << "*";
    }
    cout << endl;
}

for (int i = n - 1; i >= 1; i--) {
    for (int j = 1; j <= n - i; j++) {
        cout << " ";
    }
    for (int j = 1; j <= i * 2 - 1; j++) {
        cout << "*";
    }
    cout << endl;
}