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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)



import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class Main {
	public static void main(String [] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader (new InputStreamReader(System.in));
		 int n =Integer.valueOf(br.readLine());
		 String [] z =br.readLine().split(" ");
		 String nums1 =z[0];
		 String nums2 =z[1];
		
         for(int i=0;i<n;i++) {
        	 System.out.print(nums1.charAt(i));
        	  System.out.print(nums2.charAt(i));
		 }
    
 
}
}