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 (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>

int main() {
    int a, b, k;

    scanf("%d", &a);
    scanf("%d", &b);
    scanf("%d", &k);

    // AとBの中間値以上の値がKだった場合、AからBまでを出力
    if ((b - a) / 2 < k) {
	for (int i = 0; a + i <= b; i++)
	    printf("%d\n", a + i);
	return 0;
    }

    for (int i = 0; i < k; i++) {
        printf("%d\n", a + i);
    }
    for (int i = k - 1; i >= 0; i--) {
        printf("%d\n", b - i);
    }
    return 0;
}