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: Wrong Answer)

#include<stdio.h>
int main()
{
    int a,b,k;
    int n;
    // 整数の入力
    scanf("%d %d %d", &a, &b, &k);

    if(a == b){
       printf("%d\n",a);
    }else{
      n = b - a -1;
      if(n <= k * 2){
        for(a; a <= b; a++){printf("%d\n",a);}
      }else{
        int m = b - k + 1;
        int z = a + k;
        for(a; a < z; a++){printf("%d\n",a);}
        for(m; m <= b; m++){printf("%d\n",m);}
      }
    }

    return 0;
}