Help me in solving LB01A problem

help
,
1

My issue

My code

# Step 1: Read and understand the problem statement and sample test cases

# Click on 'Next' once you are ready to proceed.
A=int(input())
C=int(input())

Learning course: Python for problem solving - 1
Problem Link: CodeChef: Practical coding for everyone

2

The logic would if both is odd or both is even and answer would be (A+C)/2 and else case it would be -1.

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