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Bit Manipulation

AND, OR, XOR, shifts, and the little tricks (n & -n, n & (n-1)) that win interviews.

Browse 2 tutorials → Other topics

Why learn Bit Manipulation?

  • Tiny topic, big interview signal.

  • Unlocks elegant O(1) solutions to specific problems.

  • A required tool for low-level and systems work.

What you can build with Bit Manipulation

Single-number (XOR) family Bitmask DP Low-level system flags and permissions

Bit Manipulation tutorials

2 articles

Hand-written tutorials, ordered as a recommended learning path.

  1. 01 Bit Manipulation A practical introduction to bit manipulation in Python — binary representation, the bitwise operators, two's complement, and the common operations to set, clear, toggle, and check individual bits.
  2. 02 Bit Tricks Six classic bit manipulation problems — Single Number, Number of 1 Bits, Power of Two, Counting Bits, Missing Number, Reverse Bits — plus the tricks that make them tick: n & (n-1), n & -n, and XOR cancellation.