March 5, 2026: We added a new Brawl Stars QR code, offering a free pentagram-theme spray. We looked for more creator and sushi codes, too, and also made sure all existing codes still work. When you're ...

Abstract: In this paper, we present a class of codes, referred to as random staircase generator matrix codes (SGMCs), which have staircase-like generator matrices. In the infinite-length region, we ...