https://jasper-aa64.github.io/tags/hockey-stick/Recent content in Hockey-Stick on JasperHugoen-usFri, 24 Apr 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/combinatorics-1-1-permutations-combinations/Fri, 24 Apr 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/combinatorics-1-1-permutations-combinations/Hockey Stick identity, addition/multiplication principles, binomial identities, example problems: bitonic sequences, multiset permutations, multi-layer coloring DP, CCPC Subpermutation.https://jasper-aa64.github.io/posts/combinatorics-d1-diophantine-equations/Fri, 24 Apr 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/combinatorics-d1-diophantine-equations/Stars and bars, bounded Diophantine equations via inclusion-exclusion, prefix-sum DP, D&C NTT, equal-cap formula, and a full worked example on CF 2127F.