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: Runtime Error)

#include <stdio.h>

int main(void)
{
  int k,len = 0;
  
  scanf("%d",&k);
  
  char s[k+1],ans[k+4];
  
  scanf("%s",s);
  
  for(int i=0; i<k; i++){
    if(s[i] == '\0'){
      printf("%s\n",s);
      return 0;
    }
    ans[i] = s[i];
  }
  
 
 for(int i=0; i<4; i++){
   if(i == 3)
     ans[k+i] = '\0';
   else
     ans[k+i] = '.';
 }
  printf("%s\n",ans);
  
  return 0;
}