return 0 implicit

Question

The last week on the ACM ICPC Mexico competition, I missed a \"return 0\" on a C++ program. For this reason we got punished with 20 minutes.

I had read that the stan

Answer 1

You could show them the line in Bjarne Stroustrup's book defining the standard where it states it: since it is the canonical standard for the language, it is not open for debate. Unfortunately I don't have a copy to look it up myself.