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;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Threading.Tasks;

namespace AtCorder
{
	public class Program
	{
		static void Main(string[] args)
		{
			var abk = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
			int a = abk[0];
			int b = abk[1];
			int k = abk[2];

			var nums = new List<int>();
			int temp = Math.Min(a + k - 1, b);
			for (int i = a; i <= temp; i++) {
				nums.Add(i);
			}

			temp = Math.Max(b - k + 1, temp + 1);
			for (int i = temp; i <= b; i++) {
				nums.Add(i);
			}

			var sb = new StringBuilder();
			foreach (int n in nums) {
				sb.AppendLine(n.ToString());
			}

			Console.Write(sb.ToString());
		}
	}
}