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4743 Star *special combinatorics Statement B April Fools Day Contest {171} PROGRAMMING April Fools Day Contest: editorial 1300
1203 Красивая команда *special combinatorics math Statement C VK Cup 2018 - Квалификация 2 {929} PROGRAMMING Разбор VK Cup 2018 — Квалификация 2 2000
233 Star Trek *special combinatorics dfs and similar dp games graphs matrices trees Statement C Central-European Olympiad in Informatics, CEOI 2020, Day 1 (IOI, Unofficial Mirror Contest, Unrated) {1402} PROGRAMMING Editorial
75 Chess Rush *special combinatorics dp implementation math Statement C Central-European Olympiad in Informatics, CEOI 2020, Day 2 (IOI, Unofficial Mirror Contest, Unrated) {1403} PROGRAMMING CEOI 2020 Online Mirror — Day 2 Tutorial
70 Build From Suffixes *special combinatorics data structures Statement H Kotlin Heroes: Episode 6 {1488} PROGRAMMING 88522
64 Inverse Problem *special combinatorics dp Statement I Kotlin Heroes: Episode 9 (Unrated, T-Shirts + Prizes!) {1910} PROGRAMMING 123261
252 Narrow Paths *special combinatorics Statement F Kotlin Heroes: Episode 10 {1958} PROGRAMMING 129483 2000
89 Sum of MEX *special combinatorics data structures dp math Statement H Kotlin Heroes: Episode 14 {2199} PROGRAMMING 151783
140 Self-Produced Sequences *special combinatorics math Statement F Kotlin Heroes: Episode 14 {2199} PROGRAMMING 151783