3 ms·Small correction: K should equal 10^d, not d/2. Unless I'm missing something.by marvy 11y agoSmall correction: K should equal 10^d, not d/2. Unless I'm missing something.nanis 11y agod is the number of digits in 10a + b. Therefore, a and b both have d/2 digits.marvy 11y agoThat works too, but the author said they have d digits each.