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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
int main(void){

	int A, B , K;	cin >> A >> B >> K;
  	int end;
  	if(B < A + K)
      end = B + 1;
  	else
      end = A + K;
  
	for(int i = A ; i < end ; i++)	cout << i << endl;
  	int next;
    if(B - K + 1 <= A + K - 1)
      	next = A + K;
  	else
    	next = B - K + 1;
  
	for(int i = next ; i <= B ; i++) cout << i << endl;

 return 0;
}