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>
main()
{
    long long a,b,k,i,j,l,p;
    scanf("%lld%lld%lld",&a,&b,&k);
    p=b-a+1;
    l=2*k-1;
    if(p<=l)
    {
        for(i=a;i<=b;i++)
            printf("%lld\n",i);
    }
    else
    {
        for(i=0;i<k;i++)
            printf("%lld\n",a++);
            for(i=(b-k+1);i<=b;i++)
            printf("%lld\n",i);
    }
    return 0;
}