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 C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <string.h>
int main(void)
{
	int n;
	scanf("%d",&n);
	char a[n+5];
	char b[n+5];
	scanf("%s %s",a,b);
	char ans[2*n + 10];
	int p1 =0 ;
	int p2 = 0;
	for(int i=0;i<2*n;i++)
	{
		if(i%2 == 0)
		{
			ans[i] = a[p1];
			p1++;
		}
		else
		{
			ans[i] = b[p2];
			p2++;
		}

	}
	printf("%s\n",ans);
	return 0;
}