Help me in solving LB01A problem

My issue

You are given 2 integers -

A and

You need to find if there exists any


B which meets the following condition

B must be an integer

B is the average of

A and

For each test case, output

B. If no such integer exists, output


My code

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

# Click on 'Next' once you are ready to proceed.
for i in range(t):
    a, c = map(int, input().split())
    b = (a+b)/2
    if b

i dont know how to solve this

drop if statement if (a+b)%2==0
then print yes else print no. Because if (a+b)%2!=0 then no integer exits which is average of given numbers and we dont need floating average

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