N = int(eval(input()))

s, t = list(map(str, input().split()))

ans = ''

for n in range(N):

    ans += s[n]

    ans += t[n]



print(ans)
import sys

def input(): return sys.stdin.readline().strip()

def mapint(): return list(map(int, input().split()))

sys.setrecursionlimit(10**9)



N = int(eval(input()))

S, T = input().split()

ans = ''

for s, t in zip(list(S), list(T)):

    ans += s+t

print(ans)
N = int(eval(input()))
s, t = list(map(str, input().split()))
ans = ""
for n in range(N):
    ans += s[n]
    ans += t[n]
print(ans)

import sys


def input():
    return sys.stdin.readline().strip()


def mapint():
    return list(map(int, input().split()))


sys.setrecursionlimit(10**9)
N = int(eval(input()))
S, T = input().split()
ans = ""
for s, t in zip(list(S), list(T)):
    ans += s + t
print(ans)

+import sys + + +def input(): +    return sys.stdin.readline().strip() + + +def mapint(): +    return list(map(int, input().split())) + + +sys.setrecursionlimit(10**9) -s, t = list(map(str, input().split())) +S, T = input().split() -for n in range(N): -    ans += s[n] -    ans += t[n] +for s, t in zip(list(S), list(T)): +    ans += s + t