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: Accepted)

#include <iostream>
#include <map>

using namespace std;

#define repd(i,a,b) for (int i=(a);i<(b);++i)
#define rep(i,n) repd(i,0,n)
typedef long long ll;


int main(){
  int a, b, k;
  cin >> a >> b >> k;
  if(b - a + 1 <= k*2){
    for(int i=a; i<=b; i++){
      cout << i << endl;
    }
  }else{
    for(int i=a; i<a+k; i++){
      cout << i << endl;
    }
    for(int i=b-k+1; i<=b; i++){
      cout << i << endl;
    }
  }
  return 0;
}