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 (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>  /*入出力*/
#include <stdlib.h> /*標準ライブラリ*/
#include <string.h> /*文字列*/
#include <math.h>   /*計算*/
#include <assert.h> /*確認*/
#include <ctype.h>  /*文字操作*/
#include <stdbool.h>/*bool型*/
#include <limits.h>/*限界*/
//---------------------------------------------------
#define rep(i, n) for(int  i = 0; i < (n); i++)
#define ABS(a) (((a)>(0))?a:-(a))
#define LL long long
#define MOD 1000000007//10^9+7(素数)
//---------------------------------------------------
LL max(LL a, LL b){
  if (a > b) {
    return a;
  }else return b;
}

int main(void)
{
  int k;
  char s[105];
  scanf("%d", &k);
  scanf("%s", &s);
  int len = strlen(s);
  if (len <= k) {
    printf("%s\n", s);
  }else{
    for (size_t i = 0; i < k; i++) {
      printf("%c", s[i]);
    }
    printf("...\n");
  }
  return 0;
}