public class JaggedArray {
    public static void main(String[] args) {
        int[][] segitiga = new int[4][];

        for (int i = 0; i < segitiga.length; i++) {
            segitiga[i] = new int[i + 1];
            for (int j = 0; j < segitiga[i].length; j++) {
                segitiga[i][j] = j + 1;
            }
        }

        for (int[] baris : segitiga) {
            for (int angka : baris) {
                System.out.print(angka + " ");
            }
            System.out.println();
        }
    }
}