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 Rust (1.15.1) (judge verdict: Runtime Error)

use std::io::*;
use std::str::FromStr;
use std::collections::VecDeque;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}

fn main() {
    let a: u64 = read();
    let b: u64 = read();
    let k: u64 = read();
    let mut q = VecDeque::new();

    for i in a..b+1 {
        q.push_back(i);
    }

    for _i in a..(a+k){
        if q.is_empty() {
            break;
        }
        println!("{}", q.pop_front().unwrap());
    }
/*
    if b > k {
        let mut v = Vec::new();
        for _i in (b-k+1)..b+1{
            if q.is_empty() {
                break;
            }
            v.push(q.pop_back().unwrap());
        }
        v.sort();
        for i in v.iter() {
            println!("{}", i);
        }
    }
*/
}