I'm more interested in this "Analysis II" the author mentions taking in his freshman year. "Analysis II" at the undergraduate level usually refers to a proof-based course on real-valued functions of several variables. Basically, a retread of Calculus III with a more rigorous foundation. But the author never mentions any mathematical results from calculus and beyond, and I'm under the impression that grade-school math competitions only target subjects in arithmetic, elementary combinatorics, and classical geometry.