B-number

A wqb-number, or B-number for short, is a non-negative integer whose decimal form contains the sub- string "13" and can be divided by 13. For example, 130 and 2613 are wqb-numbers, but 143 and 2639 are not. Your task is to calculate how many wqb-numbers from 1 to n for a given integer n.

Process till EOF. In each line, there is one positive integer n(1 <= n <= 1000000000).

Print each answer in a single line.

13
100
200
1000

1
1
2
2

wqb0039

2010 Asia Regional Chengdu Site —— Online Contest