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;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Contest
{
    class Program
    {
        static int Main(string[] args)
        {
            new Program().Process();

            return 0;
        }

        private CommonInput cin;

        private void Process()
        {
            this.cin = new CommonInput();

            int a, b, c, count;
            a = cin.GetInt();
            b = cin.GetInt();
            c = cin.GetInt();

            count = 0;

            for (int i = a; i <= b; i++)
                if (c % i == 0)
                    count++;

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

    public class CommonInput
    {
        public CommonInput()
        {
            this._s = new string[0];
            this._i = 0;
        }

        private string[] _s;
        private int _i;
        private char[] _sep = { ' ' };

        public string GetLine()
        {
            if (this._i < this._s.Length)
                return this._s[this._i++];

            string line;
            this._i = 0;
            do
            {
                line = Console.ReadLine();
            } while (line == "");

            this._s = line.Split(this._sep, StringSplitOptions.RemoveEmptyEntries);

            return this._s[this._i++];
        }

        public int GetInt()
        {
            return int.Parse(this.GetLine());
        }

        public long GetLong()
        {
            return long.Parse(this.GetLine());
        }

        public double GetDouble()
        {
            return double.Parse(this.GetLine());
        }
    }
}