You are given three integers a, b and c.
Write a program that finds the number of all integers from a to b that, when multiplied by a number
c , are even numbers
Input:
The first line contains three integers a, b and c (a<=b, a,b modulo no more than 100, 0<=c<=9)
Output:
The program should print a single number - the number of all integers from a to b, which, when multiplied by the number
c , will be even numbers
Example