题解 | #整型数组合并#
整型数组合并
https://www.nowcoder.com/practice/c4f11ea2c886429faf91decfaf6a310b
n = int(input())
ls1 = list(map(int,input().split()))
m = int(input())
ls2 = list(map(int,input().split()))
ls3 = ls1 +ls2
ls4 = list(set(ls3))
ls4.sort()
print(''.join(map(str,ls4)))