Help me in solving PSORT3 problem

My issue

There’s no solution given to this problem.

My code

n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))

a.sort()
b.sort(reverse = True)

output = ''
for _ in range(n):
    output += str(a[_]) + ' ' + str(b[_])
    
    if _ != n - 1:
        output += ' '
    
print(output)

Learning course: Jump from 2* to 3*
Problem Link: CodeChef: Practical coding for everyone