th, and the second — from 320th to 639th. 320 is the dividing index.
	</p>
	<p>
Step 3. Select the right half-range. If the element pointed by the dividing index is greater than 480, then 480 may only be in the first half-range. It may not be there either but that's yet inconclusive. If the dividing number is less or equal than 480, then it may only be in the second half-range.
	</p>
	<p>
Step 4. Run step 1 for the new range.
	</p>
	<p>
Eventually, and in fewer then a dozen iterations, you'll either f