this site is not very old and yet, speaking as mostly an "outsider," clearly has a colorful/ unusual history. it is not a typical site for stackexchange and has many unique aspects, such as demographics like a very dedicated user base, young, and very eager to learn, etc. my suggestion is that s...

Given $n$ jobs $J_1,J_2,...,J_n$, each job requires $T_i > 0, T_i \in N$ time to complete. Each job must be pre-processed and post-processed by a single machine M that can handle only 1 job at a time and both phases require 1 unit of time. After being pre-processed, job $J_i$ is sent to a machin...