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>
#include <stdlib.h>

int main(){
    int A,B,K,i;
    scanf("%d %d %d",&A,&B,&K);
    if (B-A > 2*K){
        int * s = malloc(sizeof(int)*2*K);
        for(i=0;i<K;i++){
            s[i]=A+i;
            s[2*K-1-i]=B-i;
        }
        for(i=0;i<2*K;i++){
            printf("%d\n", s[i]);
        }        
    } else{
        for(i=A;i<=B;i++){
        printf("%d\n", i);
        }
    }
    return 0;
}