A very quick Riddler’s riddle last week with the question
Find the (integer) fraction with the smallest (integer) denominator strictly located between 1/2020 and 1/2019.
and the brute force resolution
for (t in (2020*2019):2021){ a=ceiling(t/2020) if (a*2019<t) sol=c(a,t)}
leading to 2/4039 as the target. Note that