How many multiples#5898
Given the integers , , and , your task is to find how many numbers between and , inclusive, are divisible by .
The input consists of a single line containing the integers , , and (-10^{17} \leq a, b \leq 10^{17}, 1 \leq c \leq 10^{17}).
Output the number of integers divisible by within the specified range.
Example 1