An odometer logs every integer reading from L to R inclusive. An auditor wants to know how many of those readings have a decimal digit sum exactly equal to a target value s. Count them.
Input format
A single line with three integers L, R, and s.
Output format
A single integer: the count of integers x with L <= x <= R whose decimal digits sum to s.
Constraints
- 1 <= L <= R <= 1000000
- 0 <= s <= 100