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<bits/stdc++.h>
using namespace std;

#define int             long long
#define ipi(x)          int x; cin>>x;
#define ips(s)			string s;cin>>s;
#define w(x)            int x; cin>>x; while(x--)
#define mk(arr,n,type)  type *arr=new type[n];
#define mod             pow(10,9)+7
#define inf             1e18
#define endl			"\n"
#define ff              first
#define ss              second
#define pb              push_back
#define mp              make_pair
#define pii             pair<int,int>
#define vi              vector<int>
#define mii             map<int,int>
#define pqb             priority_queue<int>
#define pqs             priority_queue<int,vi,greater<int> >

void c_p_c()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
#ifndef ONLINE_JUDGE

	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
}

int32_t main() {
	c_p_c();
	ipi(n);
	ips(s);
	string output = "";
	if (s.length() <= n)
		cout << s << endl;
	else {
		for (int i = 0; i < n; i++) {
			output = output + s[i];
		}
		output = output + "...";
		cout << output << endl;
	}
	return 0;
}