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 (GCC 5.4.1) (judge verdict: Runtime Error)

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;

// 数字の各桁の和を返す
int sumDigits (int n) {
    int s;
    while (n < 0) {
        s += n % 10;
        n /= 10;
    }
    return s;
}

// 最大公約数を返す
int gcd (int x, int y) {
  if (y == 0) return x;
  return gcd(y, x%y);
}

int main () {
  int A, B, K; cin >> A >> B >> K;
  vector<int> a(B-A+1);
  
  for (int i = A; i <= B; i++) a[i-A] = i;
  
  if (a.size() < K*2) {
    for (int i = A; i <= B; i++) cout << i << endl;
  } else {
    for (int i = 0; i < K; i++) cout << a[i] << endl;
    for (int i = a.size()-K; i < a.size(); i++) cout << a[i] << endl;
  }
}