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():
    #1. input
    A, B, K = map(int, input().split())
    
    #2. append nums while A+K<B
    ans_set = set()
    for k in range(K):
        if A+k > B:
            break
        ans_set.add(A+k)
        ans_set.add(B-k)
    ans_set = sorted(ans_set)
    
    #3. output
    for ans in ans_set:
        print(ans)


if __name__ == "__main__":
    main()