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: Accepted)

using System;



class Program
{
    static void Main(string[] args)
    {
        Input CInput = new Input();
        int[] input = new int[(int)Input.Define.MAX_ArraySize];
        //int[,] input = new int[(int) Input.Define.MAX_ArraySize, (int) Input.Define.ArraySize2d];
        //int num = 0;
        input = CInput.Line1_int(' ', 3);
        //input = CInput.Multiline_int(' ' ,2, ref num);

        int count = 0;
        for (int i = input[0]; i <= input[1]; i++)
        {
            if (input[2] % i == 0) count++;
        }

        Console.WriteLine("{0}",count);

    }








    class Input
{
    public enum Define
    {
        MAX_ArraySize = 1000000,
        ArraySize2d = 2,                // 2?¬?????????????[][?] ???????
    }

    public string Line1_string()
    {
        return Console.ReadLine();
    }

    public int Line1_int()
    {
        var input = Console.ReadLine();
        return int.Parse(input);
    }

    public int[] Line1_int(int chr, int num)
    {
        var input = Console.ReadLine();
        var split = input.Split(' ');
        int[] spliti = new int[100];
        for (int i = 0; i < num; i++)
        {
            spliti[i] = int.Parse(split[i]);
        }
        return spliti;
    }

    public int[] Multiline_int(ref int datanum)
    {
        int i = 0;
        int[] data = new int[(int)Input.Define.MAX_ArraySize];
        while (true)
        {
            var input = Console.ReadLine();
            var value = int.Parse(input);
            if (value == 0) break;
            data[i] = value;
            i++;
        }
        datanum = i;
        return data;
    }
    /// <summary>
    /// ?????°??????int??????????????????????????????
    /// </summary>
    /// <param name="chr">???????????????</param>
    /// <param name="num">?????????????????????????????°</param>
    /// <param name="datanum">??????????????????????????°</param>
    /// <returns></returns>
    public int[,] Multiline_int(int chr, int num, ref int datanum)
    {
        int i = 0;
        int[,] data = new int[(int)Input.Define.MAX_ArraySize, (int)Input.Define.ArraySize2d];
        while (true)
        {
            var input = Console.ReadLine();
            var split = input.Split(' ');
            int[] spliti = new int[100];
            for (int j = 0; j < num; j++)
            {
                spliti[j] = int.Parse(split[j]);
            }
            if (spliti[0] == 0 && spliti[1] == 0) break;
            data[i, 0] = spliti[0];
            data[i, 1] = spliti[1];
            i++;
        }
        datanum = i;
        return data;
    }

}
}