Problem:
Score : 200 points

Problem Statement

Print all the integers that satisfies the following in ascending order:

Among the integers between A and B (inclusive), it is either within the K smallest integers or within the K largest integers.

Constraints

1 \leq A \leq B \leq 10^9

1 \leq K \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B K

Output

Print all the integers that satisfies the condition above in ascending order.

Sample Input 1

3 8 2

Sample Output 1

3
4
7
8

3 is the first smallest integer among the integers between 3 and 8.

4 is the second smallest integer among the integers between 3 and 8.

7 is the second largest integer among the integers between 3 and 8.

8 is the first largest integer among the integers between 3 and 8.

Sample Input 2

4 8 3

Sample Output 2

4
5
6
7
8

Sample Input 3

2 9 100

Sample Output 3

2
3
4
5
6
7
8
9

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace AtCoder
{
	class Program
	{
		static void Main(string[] args)
		{
			Question.Exec();
		}
	}

	public static class Question
	{
		public static void Exec()
		{
			var array = Console.ReadLine().Split(' ').Select(i => long.Parse(i)).ToArray();
			long a = array[0];
			long b = array[1];
			long k = array[2];

			if (b - a >= 2 * k) {
				for (var i = 0; i < k; ++i) {
					Console.WriteLine($"{a + i}");
				}

				for (var i = 1; i <= k; ++i) {
					Console.WriteLine($"{b - k + i}");
				}
			} else {
				for (var i = a; i <= b; ++i) {
					Console.WriteLine($"{i}");
				}
			}

			Console.ReadKey();
		}
	}
}