## problem:-

You have been given 3 integers - l, r and k. Find how many numbers between l and r (both inclusive) are divisible by k. You do not need to print these numbers, you just have to find their count.

Input Format

The first and only line of input contains 3 space separated integers

Output Format

Print the required answer on a single line.

Constraints

Input Format

The first and only line of input contains 3 space separated integers

*l*,*r*and*k*.Output Format

Print the required answer on a single line.

Constraints

SAMPLE INPUT

1 10 1

SAMPLE OUTPUT

10

Time Limit:1.0 sec(s) for each input file.

Memory Limit:256 MB

Source Limit:1024 KB

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