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9.4 Exercises

Basic Difficulty​

268. Missing Number​

A variation of the Single Number problem. Besides using bitwise operations, the problem can also be solved using the Gaussian summation formula.

693. Binary Number with Alternating Bits​

Use bitwise operations to determine whether a number's binary representation alternates between 0 and 1.

476. Number Complement​

A variation of binary flipping problems.

Advanced Difficulty​

260. Single Number III​

A follow-up to the Single Number problem. Requires careful thought on how to leverage bitwise operations to solve.