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.Linq;
using System.Collections.Generic;
using static System.Console;


class Program {
    internal static void Main(string[] args)
    {
        int[] inp = ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();
        int A = inp[0];
        int B = inp[1];
        int K = inp[2];
        int hoge = B - A;
        var lst = new List<int>();

        int a = A;
        for (int i = 0; i < K; i++) {
            if (i > hoge) { break; }
            lst.Add(a);
            a++;
        }

        int b = B;
        for (int i = 0; i < K; i++) {
            if (i > hoge) { break; }
            lst.Add(b);
            b--;
        }

        lst = lst.OrderBy((i => i)).Distinct().ToList();
        foreach (int i in lst) {
            WriteLine(i);
        }
    } 
}