PROBLEM LINK:
Contest  Division 3
Contest  Division 2
Contest  Division 1
DIFFICULTY:
CAKEWALK
PROBLEM:
Given two integers a and b, determine if their sum is odd or even.
EXPLANATION:
The problem is just blind implementation.
Check if a+b is odd or even (how?) and output:

Alice
if it is odd, and 
Bob
otherwise.
TIME COMPLEXITY:
O(1)
per test case.
SOLUTIONS:
Editorialistâ€™s solution can be found here.
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