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 Python (3.4.3) (judge verdict: Accepted)

def main():
    a, b, k = map(int, input().split())

    ans = set()

    for i in range(k):
        x = a + i
        if x <= b:
            ans.add(x)

        y = b - i
        if a <= y:
            ans.add(y)

    for i in sorted(list(ans)):
        print(i)


def main2():
    a, b, k = map(int, input().split())
    ans = []
    if 2 * k <= b - a + 1:
        for i in range(k):
            ans.append(a + i)
            ans.append(b - i)
    else:
        for i in range(a, b + 1):
            ans.append(i)

    for i in sorted(ans):
        print(i)


if __name__ == '__main__':
    main2()