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Cheat Sheet

Bit Manipulation Cheat Sheet

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What is Bit Manipulation?

Leverage binary operations for space and time efficiency.

Trigger Words

When you see these in a problem, think Bit Manipulation:

single number bit-manipulation number of 1 bits counting bits reverse bits missing number sum of two integers reverse integer

Template Code

def singleNumber(nums: List[int]) -> int:
    result = 0
    for num in nums:
        result ^= num
    return result

Complexity

Typical Time O(n)
Typical Space O(1)

Common Variations

  • Basic Bit Manipulation
  • Bit Manipulation with constraints
  • Optimized Bit Manipulation

Practice Problems

Single Number easy Number of 1 Bits easy Counting Bits easy Reverse Bits easy Missing Number easy
See all Bit Manipulation problems →

Practice Bit Manipulation

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