Problem Solving Journal

Problem Solving Journal 3

Oct 13, 2025

Problems: Modular Tetration · 1-Regular Subgraphs of 2-Regular Directed Graphs · Propagation Queries on Trees, Revisited

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Problem Solving Journal 2

Apr 21, 2025

Problems: Binary Subsequence Value Sum · Counting Squarefree GCD Pairs · Duplicates · Forming Groups · Interval Queries on the Greatest GCD Pair

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Problem Solving Journal 1

Feb 20, 2025

First problem solving journal. Most future entries will only be visible through the problem solving journal filter.

Problems: Distinct Multisets With Equal Sum(multi)sets · Efficient Lower-Bounded Exponential Propagation Queries on Trees

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