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 <iostream>


int main() {
  int a, b, k;
  std::cin >> a >> b >> k;
  // [a, a+k)
  int range_a_max = a + k;
  b++;
  // [b-k, b)
  int range_b_min = b - k;
  if (range_a_max >= range_b_min) {
    for (int i = a; i < b; i++) {
      std::cout << i << std::endl;
    }
    return 0;
  }
  for (int i = a; i < range_a_max; i++)
    std::cout << i << std::endl;
  for (int i = range_b_min; i < b; i++)
    std::cout << i << std::endl;

  return 0;
}