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 PHP (5.6.30) (judge verdict: Accepted)

<?php

$input = explode(' ', trim(fgets(STDIN)));
$a = intval($input[0]);
$b = intval($input[1]);
$k = intval($input[2]);

$result = [];

$i = 0;
while ($i < $k) {
    // 対象はA以上B以下のみ
    if ($a <= $a + $i && $b >= $a + $i) {
        $result[] = $a + $i;
    }
    if ($a <= $b - $i && $b >= $b - $i) {
        $result[] = $b - $i;
    }
    $i++;
}
$result = array_unique($result);
asort($result);
foreach ($result as $value) {
    echo "$value\n";
}