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;

namespace ITP1_3_D
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] strs = Console.ReadLine().Split(' ');
            int a = int.Parse(strs[0]);
            int b = int.Parse(strs[1]);
            int c = int.Parse(strs[2]);

            int sqrt = (int)Math.Sqrt(b);
            if (b > sqrt) b = sqrt;
            int n = 0;
            for (int i = a; i <= b; i++)
            {
                if (c % i == 0) n++;
            }
            Console.WriteLine(n);
        }
    }
}