import java.util.*;

public class Main{
    public static void main(String[] srgs){
        Scanner sc=new Scanner(System.in);

        int n=sc.nextInt();
        String a=sc.next(),b=sc.next();
        for(int i=0;i<n;i++){
            System.out.print(a.charAt(i));
            System.out.print(b.charAt(i));
        }
    }
}

/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