Problem:
How Many Divisors?

Write a program which reads three integers a, b and c, and prints the number of divisors of c between a and b.

Input

Three integers a, b and c are given in a line separated by a single space.

Output

Print the number of divisors in a line.

Constraints

1 ≤ a, b, c ≤ 10000

a ≤ b

Sample Input 1

5 14 80

Sample Output 1

3

Solution in C# (judge verdict: Wrong Answer)

using System;

class MainClass
{
	public static void Main (string[] args)
	{
		string str = Console.ReadLine ();
		string[]spStr = str.Split(' ');

		int a = int.Parse (spStr[0]);
		int b = int.Parse (spStr[1]);
		int c = int.Parse (spStr[2]);

		int yakusu = 0;
		for (int i = a; i < b; i++) {
			if (i % c == 0) {
				yakusu++;
			}
		}

		Console.WriteLine (yakusu);


	}
}