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: Wrong Answer)

#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp> 
//#include <ext/pb_ds/tree_policy.hpp>
//#include <functional> // for less
//using namespace __gnu_pbds;
using namespace std;
typedef long long  L;

#define max_(x, y) (((x) > (y)) ? (x) : (y))
#define min_(x, y) (((x) < (y)) ? (x) : (y))
#define ___ ios_base::sync_with_stdio(false);cin.tie(NULL);
#define Mx 2000001
#define inf 1e15
const L MOD = 1e9+7;
const double pi = 2 * acos (0.0);

/*------------------------------Graph Moves----------------------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
//const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1};   // Kings Move
//const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1};  // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*---------------------------------------------------------------------*/


//typedef tree<L,null_type,less<L>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

L a1,a2,a3,b1,b2,b3,c,c1,c2,c3,d,d1,d2,d3,d4,d5,e1,e2,e3,f,h,k,l,m,n,m1,m2,n1,n2,o,p,p1,p2,p3,p4,
q,q1,q2,q3,q4,r,s,t,u,v,x,y,z,sum,mx=-inf,mn=inf,flg,flg1,flg2,id1,id2,id3,cnt,lim;
char str[Mx];
int main()
{
    scanf("%lld%s",&n,str);
    lim=strlen(str);
    for(L i=0;i<lim;i++){
        if(i>=n)str[i]='.';
    }
    printf("%s\n", str);
    return 0;
}
/// empty() lld I64d push_back() top() pop() insert() upper_bound() lower_bound() memset() max() min() scanf continue