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++14 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include<iostream>
using namespace std;
int main()
{
    long long n,m,i;
    int k;
    while(cin>>n>>m>>k&&(n>=1&&n<=m&&m<=100000000&&k>=1&&k<=100))
    {
        if((m-n+1)<=2*k)
            for(i=n;i<=m;i++)
                cout<<i<<endl;
        else
        {
            for(i=n;i<n+k;i++)
                cout<<i<<endl;
            for(i=m-k+1;i<=m;i++)
                cout<<i<<endl;
        }
    }
    return 0;
}