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 Rust (1.42.0) (judge verdict: Accepted)

use itertools::izip;
use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        _n: usize,
        s: String,
        t: String,
    }

    let mut ans = "".to_string();

    for (s, t) in izip!(s.chars(), t.chars()) {
        ans.push(s);
        ans.push(t);
    }

    println!("{}", ans);
}