Question

Lets say I have a simple for loop with an index i that goes from 0 to n. I want to be able to loop by i and each loop generate two numbers in the following sequence:

i | a | b
=========
0 | 2 | 1
1 | 2 | 3
2 | 2 | 5
3 | 5 | 1
4 | 5 | 3
5 | 5 | 5
6 | 9 | 1
7 | 9 | 3
8 | 9 | 5
9 | 12| 1
10| 12| 3
11| 12| 5
12| 16| 1
   ...

Basically, the algorithm is, for a it starts with 2 and increments by 3 and 4 in turns, whereas for b it always goes through 1, 3 and 5 and then starts over.

I have been trying to produce something without much result. I would prefer an answer in java but pseudocode or any non-esoteric language will do fine.

Answer 1

class Main
{
    public static void main (String[] args)
    {
        for(int i = 0 ; i < 20 ; i++)
        {
            int a = (i / 6) * 7 + 2 + ((i / 3) & 1) * 3;
            int b = (i % 3) * 2 + 1;
            System.out.println(i + " | " + a + " | " + b);
        }
    }
}