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;
namespace _093b
{
    class Program
    {
        static void Main(string[] args)
        {
            long[] read = Array.ConvertAll(Console.ReadLine().Split(),long.Parse);
            long count = 1;
            long start_num = read[0];
            HashSet<long> hsTable = new HashSet<long>();
            while(count<=read[2]){
                // Console.WriteLine(start_num);
                hsTable.Add(start_num);
                start_num++;//2,3,4,5,6,7,8,9
                count++;
                if(start_num>read[1]){
                    break;
                }
            }
            if(read[1]-read[0]<read[2]){
                start_num = read[0];
            }else{
                start_num = read[1] - read[2] + 1;
            }
            count = 1;
            while(count<=read[2]){
                // Console.WriteLine(start_num);
                hsTable.Add(start_num);
                start_num++;
                count++;
                if(start_num>read[1]){
                    break;
                }
            }
            foreach(var num in hsTable){
                Console.WriteLine(num);
            }
        }
    }
}