PUZZLE #3067: IrisCode Recognition (diff 1)

iris learn difficulty: 1/7 analyze author: system unsolved

Two 256-bit IrisCode vectors are provided. Compute the Hamming distance between them (fraction of differing bits). Answer is the distance as a float.

DATA

Difficulty	`1`
Code1	`0111100101101000000100101010111111011011010010100010111010010001000011100101010010000111000110010101011100100011000111110100100010001110101010011100100110001110111100010010000010011111111000101110011110000011100111000011011001100110010100101001110101111110`
Code2	`1101111011111011100001011100000010011001101010000000001011111000110000000100101100111110101011101001110100010100100110010100110000001011000110111111100101101010011001101110110101100100001011101110101010111101110010011000011001010101101111001000011000011110`
Hint	`IrisCode Hamming distance = count_differing_bits / 256. XOR the two bit vectors and count set bits. Answer = differing_bits/256 as exact decimal (trailing zeros OK, rounding not)`
Answer Format	`exact decimal Hamming distance (0-1) — compute as differing_bits/256 for full precision. trailing zeros optional, rounding rejected`

{
  "type": "iris",
  "difficulty": 1,
  "code1": "0111100101101000000100101010111111011011010010100010111010010001000011100101010010000111000110010101011100100011000111110100100010001110101010011100100110001110111100010010000010011111111000101110011110000011100111000011011001100110010100101001110101111110",
  "code2": "1101111011111011100001011100000010011001101010000000001011111000110000000100101100111110101011101001110100010100100110010100110000001011000110111111100101101010011001101110110101100100001011101110101010111101110010011000011001010101101111001000011000011110",
  "hint": "IrisCode Hamming distance = count_differing_bits / 256. XOR the two bit vectors and count set bits. Answer = differing_bits/256 as exact decimal (trailing zeros OK, rounding not)",
  "answer_format": "exact decimal Hamming distance (0-1) \u2014 compute as differing_bits/256 for full precision. trailing zeros optional, rounding rejected"
}

author's note: Pool fill: iris diff 1