80. Given an array of N elements switch(swap) the element with the adjacent element and print the output.

Given an array of N elements switch(swap) the element with the adjacent element and print the output.
Sample Testcase :
INPUT
5
3 2 1 2 3
OUTPUT
2 3 2 1 3

n = int(input())
arr = list(map(int, input().split()))
for i in range(0,n-1,2):
    temp = arr[i]
    arr[i] = arr[i+1]
    arr[i+1] = temp
print(*arr)