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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Linq;
using System.Collections.Generic;
namespace Sample
{
  class Sample
  {
    static void Main(string[] args)
    {
    string[] str=Console.ReadLine().Split(' ');
      int A=int.Parse(str[0]);
      int B=int.Parse(str[1]);
      int K=int.Parse(str[2]);
      
      if(K>B){
       for(int i=A;i<=B;i++){
         Console.WriteLine(i);
      }
      }
      else{
        int[] ans=new int[2*(K+1)];
        for(int i=0;i<K;i++){
          ans[i]=A+i;
          ans[ans.Length-1-i]=B-i;
        
      }
        int[] dis=ans.Distinct().ToArray();
        for(int i=0;i<dis.Length;i++){
          if((A<=dis[i])&&(dis[i]<=B)){
          Console.WriteLine(dis[i]);
          }
        }
      }
    }
    
  }

}