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;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AtCoder.Abc
{
    public class QuestionA
    {
        public static void Main(string[] args)
        {
            // 整数配列の入力
            var inputLongArray = Console.ReadLine().Split(' ').Select(i => int.Parse(i)).ToArray();
            int A = inputLongArray[0];
            int B = inputLongArray[1];
            int K = inputLongArray[2];
            string outStr1 = "";
            string outStr2 = "";
            bool endFlg = false;
            
            //下限からチェック
            for (int i=0; i < K; ++i) {
                //上限値を超えた場合は後半処理は無しで終了させる
                if(A + i > B) {
                    endFlg = true;
                    break;
                }
                outStr1 += (A+i).ToString() + "\n";
            }

            if(endFlg == false) {
                for (int i = K-1; i >= 0; --i) {
                    if(outStr1.Contains((B - i).ToString()) == false){
                        outStr2 += (B - i).ToString() + "\n";
                    }
                }
            }

            Console.WriteLine(outStr1 + outStr2);
        }
    }
}