Problem:
Score: 200 points

Problem Statement

We have a string S consisting of lowercase English letters.

If the length of S is at most K, print S without change.

If the length of S exceeds K, extract the first K characters in S, append ... to the end of them, and print the result.

Constraints

K is an integer between 1 and 100 (inclusive).

S is a string consisting of lowercase English letters.

The length of S is between 1 and 100 (inclusive).

Input

Input is given from Standard Input in the following format:

K
S

Output

Print a string as stated in Problem Statement.

Sample Input 1

7
nikoandsolstice

Sample Output 1

nikoand...

nikoandsolstice has a length of 15, which exceeds K=7.

We should extract the first 7 characters in this string, append ... to the end of them, and print the result nikoand....

Sample Input 2

40
ferelibenterhominesidquodvoluntcredunt

Sample Output 2

ferelibenterhominesidquodvoluntcredunt

The famous quote from Gaius Julius Caesar.

Solution in Rust (1.42.0) (judge verdict: Wrong Answer)


fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let length = s.trim().parse().unwrap();
    s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let input = s.trim();
    println!("{}", input);
    if input.chars().count() > length {
        for (i, c) in input.chars().enumerate() {
            if i < length {
                print!("{}", c);
            } else {
                println!("...");
                break;
            }
        }
    } else {
        println!("{}", input);
    }
}