Assuming negative numbers are not allowed, the how about: [3, 2] Creating a zero is useless, you can’t split 3 or 2, and you can’t make a 5. [2, 1] is simila

Assuming negative numbers are not allowed, the how about: [3, 2] Creating a zero is useless, you can’t split 3 or 2, and you can’t make a 5. [2, 1] is similarly stuck.