Sorry I didn’t notice your question until now!
Cycles are counted only for the first set of inputs/outputs (because subsequent tests use random data and the statistics need to be comparable across runs).
For memory bytes, there are 256 possible addresses on the SIC-1 and the statistic represents the number of those addresses that were accessed during the first test set (regardless of the number of times each addressed was accessed). The idea is that it’s the maximum amount of memory required to run the program. Note: each subleq instruction is 3 bytes.