100000000

${\color{#D61F06}{12345678\dots 99999999100000000}} \\ \ \\ {\color{#3D99F6}{1, 2, 3, 4, 5, 6, 7, 8, \dots, 9999999999, 10000000000}}$

$A$ : The number of digits colored red.

$B$ : The number of 0s colored blue.

Which is bigger, $A$ or $B$ ?

Note : Write down the concatenate the positive integers in increasing sequence untill $10^8$ colored red. Write down the positive integers in increasing sequence until $10^9$ colored blue.