欢乐赛#36 T4题解

n = int(input()) 
S1 = list(input())  
S2 = list(input()) 
for i in range(0, n, 2):  
    S1[i], S2[i] = S2[i], S1[i] #列表元素交换
for j in range(len(S1)):
    print(S1[j],end = '')