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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
3243 Treelabeling bitmasks constructive algorithms dfs and similar games graphs greedy trees Statement D Codeforces Round 754 (Div. 2) {1605} PROGRAMMING 2000.0 tutorial 2100
1008 Christmas Chocolates dfs and similar dp games graphs implementation math number theory shortest paths trees Statement E Codeforces Round 761 (Div. 2) {1617} PROGRAMMING 3000.0 Editorial for Codeforces Round #761 (Div. 2)
4503 Resourceful Caterpillar Sequence dfs and similar dp games graphs implementation trees Statement E Good Bye 2024: 2025 is NEAR {2053} PROGRAMMING 2000.0 Good Bye 2024: 2025 is NEAR Editorial
444 The Game (Hard Version) data structures dfs and similar games graphs trees Statement E2 Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) {2062} PROGRAMMING 2500.0 Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) Editorial
4313 The Game (Easy Version) dfs and similar games graphs trees Statement E1 Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) {2062} PROGRAMMING 1500.0 Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) Editorial
1332 Jerry and Tom data structures dfs and similar games graphs greedy trees Statement C Codeforces Round 1077 (Div. 1) {2187} PROGRAMMING 1750.0 Codeforces Round 1077 (Div. 1, Div. 2) Editorial