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: Accepted)

#include<stdio.h>


int main(void)
{
    char mus[200];
    char S[100];
    char T[100];
    int i, N;
    char bin;

    scanf("%d", &N);
    scanf("%c", &bin);

    for (i = 0; i < N; i++) {
        scanf("%c", &S[i]);
    }
    scanf("%c", &bin);

    for (i = 0; i < N; i++) {
        scanf("%c", &T[i]);
    }


    for (i = 0; i < N; i++) {
        printf("%c%c",S[i], T[i]);
    }


    return 0;

}