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L1.R1.echo-2

Echo two bytes · ● solved

Challenge

ladder rank

#5 (level L1)

family / transform

EchoPrefix / Identity

cases

1 case(s), 2 output byte(s)

limits

program ≤ 128 bytes, ≤ 256 steps/case

purpose

Extend echo-prefix synthesis from one byte to two bytes.

Winning program

solutions/echo/echo-2.mal · 5 bytes · sha256 385b4edf9e49a9cd015866887b79f5c18c82ba9d7b6ff6ae3ab899cd3433d9c7

ubs`M

Solver

name

HeLL-Lite (tool)

type

tool

harness

tools/hell_lite compile-linear (deterministic straight-line template)

metric

1/1 case, 5 seeds

attribution notes

First-use opcode encoding of the straight-line IN/OUT sequence; each address has exactly one printable byte per opcode.

Notes

Echo the first 2 input bytes; 5-byte straight-line program.

Verification transcript (native VM, 3 epoch(s))

epoch 0 · seed 99a599788c60… · 1/1 cases

epoch 1 · seed 7ba7077edc2a… · 1/1 cases

epoch 2 · seed 126b963038d0… · 1/1 cases

Reproduce

git clone https://github.com/oklo/malbolge-rungs
cargo run -p harness -- verify --rung L1.R1.echo-2 --program solutions/echo/echo-2.mal --epochs 3 --verbose