Help me in solving BMC14 problem

help
,
1

My issue

how to debug this code

My code

for t in range(int(input())):
    n, m = map(int, input().split())
    if n % 2 != 0 and m % 2 != 0:
        print(n + m - 1)
    elif n % 2 != 0 and m % 2 == 0:
        print(m)
    elif n % 2 == 0 and m % 2 != 0:
        print(n)

Learning course: Python with Data structures
Problem Link: Practice Problem in - CodeChef