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>

int main()
{
  int k;
  char s[101];
  scanf("%d", &k);
  scanf("%s", s);
  
  char ans[101];
  int i = 0, needsDot = 0;
  while (1) {
    if (s[i] == '\0') {
      ans[i] = '\0';
      break;
    }
    
    if (i < k) {
      ans[i] = s[i];
    } else {
      ans[i] = '\0';
      needsDot = 1;
      break;
    }
    i++;
  }
  
  if (needsDot == 1) {
    printf("%s...\n", ans);
  } else {
    printf("%s\n", ans);
  }
  
  return 0;
}