A positive integer n is a semi-1 number if exactly half of the integers from 1 through n contain the digit 1. For example, 16 is semi-1, because exactly 8 of the integers between 1 and 16 contain the digit 1:

{1, 10, 11, 12, 13, 14, 15, 16}.

Find the largest semi-1 number you can find!

Slope game helps improve the player's reflexes and agility. Players use the arrow keys to control the ball, helping it roll down the slope and avoid obstacles.

Posted by sarausa on 2024-10-08 23:57:23