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>

#define pb push_back
#define fi first
#define se second
#define eb emplace_back

using namespace std;

typedef pair<int, int> ii;
typedef long long ll;
const int N = 1000007, inf = 0x3f3f3f3f;

int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	int k; cin >> k;
	string s; cin >> s;
	if(s.size() <= k) {
		cout << s << '\n';
	}else {
		s = s.substr(0, k);
		cout << s << "...\n";
	}
}