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All topics›JavaScript›Bit manipulation

Decode XORed Array

beginnerlayer I11 · Bit manipulation5 tests

An array arr of n non-negative integers was encoded into an array encoded of length n - 1, where encoded[i] === arr[i] ^ arr[i + 1]. Given encoded and the first element first, rebuild and return arr.

  • The answer is always unique
  • encoded may be empty, in which case arr is just [first]

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