Given two integers a and b, return the larger of the two without using any conditional branch (no if statements or comparison operators driving control flow). Derive the result from the sign of the difference using bitwise operations.
Input: A JSON object {"a": <integer>, "b": <integer>}.
Output: Return the maximum of a and b.
Input: {"a":3,"b":9}
Output: 9
Explanation: 9 is larger, returned without a branch.Input: {"a":-3,"b":-9}
Output: -3
Explanation: -3 is larger than -9.-10^9 <= a, b <= 10^9