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: Accepted)

use proconio::*;
#[allow(unused_imports)]
use proconio::marker::{Bytes, Chars};
use std::*;

#[allow(dead_code)]
const MOD: i128 = 100_000_007;

#[fastout]
fn main() {
    input!{
        n :usize,
        s : Chars
    }
    let lens = s.len();
    if lens > n {
        println!("{}...",s.iter().take(n).collect::<String>());
    } else {
        println!("{}",s.iter().collect::<String>());
    }
}