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 JAVA (judge verdict: Accepted)

import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a, b, c;
		int count = 0;
		a = scan.nextInt();
		b = scan.nextInt();
		c = scan.nextInt();

		if (a > b) {
			throw new RuntimeException("error:You must write a<=b");
		}
		if (a < 1 || 10000 < a || b < 1 || 10000 < b || c < 1 || 10000 < c) {
			throw new RuntimeException("error:You must write 1<=a,b,c<=10000");
		}
		for (int i = a; i <= b; i += 1) {
			if (c % i == 0) {
				count++;
			}
		}
		System.out.println(count);
	}
}