Produce a working ARM64 executable at /app/resta that outputs 5 - 3 = 2 (with newline) and exits with code 0.

Produce a working ARM64 executable at /app/resta that outputs 5 - 3 = 2 (with newline) and exits with code 0.: a task in rts-1k-rootless-apptainer: RTS-1K: offline rootless Apptainer release (Harbor dataset). What the agent is asked, how it is graded, what it runs in, and its files.