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 C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using static AtCoderTemplate.MyLibrary;

namespace AtCoderTemplate
{
    class Program
    {
        static void Main(string[] args)
        {
            int k = int.Parse(Console.ReadLine());
            string s = Console.ReadLine();

            if(s.Length <= k)
            {
                Console.WriteLine(s);
            }else{
                string output = s.Substring(0,k) + "...";
                Console.WriteLine(output);
            }
            //Console.WriteLine("Hello World!");
        }
    }
    //2回位使ったら追加する
    class MyLibrary
    {
        public static int[] ToIntArray(string[] stringArray)
        {
            int length = stringArray.Length;
            int[] intArray = new int[length];
            for (int i = 0; i < length; i++)
            {
                intArray[i] = int.Parse(stringArray[i]);
            }
            return intArray;
        }
    }
}