public class Solution {
    public static void main(String[] args) {
    int a = 1;
    if(a < 2)
     System.out.println(a);
                a = a + 2;
            if(a < 4)
             System.out.println(a);
                a = a + 3;
            if(a < 8)
             System.out.println(a);
                a = a + 4;
             System.out.println(a);

    }
}