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 res = "" ;
      	for(int i = 0  ; i < s1.length() ; i++) {
        	res+=s1.charAt(i);
            res+=s2.charAt(i) ; 
        }
      System.out.println(res) ;
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz