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.Text;

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

      StringBuilder buf = new StringBuilder();
      if (b - a < k * 2)
      {
        for (var i = a; i <= b; i++)
            buf.Append(i).Append('\n');
      }
      else
      {
        for (var i = a; i < a + k; i++)
          buf.Append(i).Append('\n');
        for (var i = b - k + 1; i <= b; i++)
          buf.Append(i).Append('\n');
      }

      Console.Write(buf);
    }
  }
}