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: Time Limit Exceeded)

using System;
using System.Linq;

namespace B___Small_and_Large_Integers
{
    class Program
    {
        static void Main(string[] args)
        {
            var ABK = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var A = ABK[0];
            var B = ABK[1];
            var K = ABK[2];

            var arr1 = Enumerable.Range(A, B - A + 1).Take(K).ToArray();
            var arr2 = Enumerable.Range(A, B - A + 1).Reverse().Take(K).OrderBy(x => x).ToArray();

            var arr = arr1.Concat(arr2).Distinct().ToArray();

            foreach (var a in arr)
                Console.WriteLine(a);
        }
    }
}