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: Memory Limit Exceeded)

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

namespace ABC093_B
{
    class Program
    {
        static void Main(string[] args)
        {
            var num = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            var A = num[0];
            var B = num[1];
            var X = num[2];
            var number = new List<int>();
            var ans = new List<int>();

            for (var i = A; i <= B; i++)
            {
                number.Add(i);
            }

            if (X > B - A + 1)
            {
                foreach (var ch in number)
                {
                    Console.WriteLine(ch);
                }
                return;
            }

            for (var i = 0; i < X; i++)
            {
                ans.Add(number[i]);
            }

            for (var i = number.Count  - X; i < number.Count ; i++)
            {
                ans.Add(number[i]);
            }

            IEnumerable<int> result = ans.Distinct(); 

            foreach(var ch in result)
            {
                Console.WriteLine(ch);
            }
        }
    }
}