Problem:
Score : 200 points

Problem Statement

Given are strings s and t of length N each, both consisting of lowercase English letters.

Let us form a new string by alternating the characters of S and the characters of T, as follows: the first character of S, the first character of T, the second character of S, the second character of T, ..., the N-th character of S, the N-th character of T. Print this new string.

Constraints

1 \leq N \leq 100

|S| = |T| = N

S and T are strings consisting of lowercase English letters.

Input

Input is given from Standard Input in the following format:

N
S T

Output

Print the string formed.

Sample Input 1

2
ip cc

Sample Output 1

icpc

Sample Input 2

8
hmhmnknk uuuuuuuu

Sample Output 2

humuhumunukunuku

Sample Input 3

5
aaaaa aaaaa

Sample Output 3

aaaaaaaaaa

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.*;
public class Main{
	public static void main(String []args){
    	Scanner sc = new Scanner(System.in) ;
      	int n = sc.nextInt() ;
      	sc.nextLine() ;
      //	String s1 = sc.next() ;
      //	String s2 = sc.next() ;
      String s[] = sc.nextLine().split(" ") ;
      String s1 = s[0] ; 
      String s2 = s[1] ;
      
       String res = "" ;
      	for(int i = 0  ; i < 2 *s1.length() ; i++) {
        	if(i%2 == 0) res+=s1.charAt(i);
          	else res+=s2.charAt(i) ; 
        }
      System.out.println(res) ;
    }
}