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++14 (GCC 5.4.1) (judge verdict: Accepted)

 #include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define mk make_pair
#define ft first
#define sc second
#define ppb pop_back
#define sz size
#define forn(i,a,n) for(i=a;i<n;i++)
#define M 1000000007
#define inf 2e18

int main() {

ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
    
      
 ll n;
 string a,b;
 cin>>n>>a>>b;
 for(ll i=0;i<n;i++)cout<<a[i]<<b[i];
 
return 0;
}