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6592 Fish bitmasks dp probabilities Statement E Codeforces Beta Round 16 (Div. 2 Only) {16} PROGRAMMING Codeforces Beta Round #16 Tutorial 2100
823 Valera and Number bitmasks dp math probabilities Statement E Codeforces Round 252 (Div. 2) {441} PROGRAMMING Разбор Codeforces Round #252 (Div. 2) 2700
37337 Dreamoon and WiFi bitmasks brute force combinatorics dp math probabilities Statement B Codeforces Round 272 (Div. 2) {476} PROGRAMMING 1300
995 Game with Strings bitmasks dp probabilities Statement C Codeforces Round 275 (Div. 1) {482} PROGRAMMING Codeforces Round #275 Editorial 2800
1673 Second price auction bitmasks probabilities Statement C Rockethon 2015 {513} PROGRAMMING 16260 2000
602 Gambling Nim bitmasks math matrices probabilities Statement A CROC 2016 - Final Round [Private, For Onsite Finalists Only] {662} PROGRAMMING Editorial for CROC 2016 Finals and Codeforces Round #347 2400
2745 Another Sith Tournament bitmasks dp Statement E Educational Codeforces Round 13 {678} PROGRAMMING Editorial 2200
1445 LRU bitmasks dp math probabilities Statement C Codeforces Round 363 (Div. 1) {698} PROGRAMMING Solution 2700
1579 X-OR bitmasks constructive algorithms interactive probabilities Statement E Codeforces Round 649 (Div. 2) {1364} PROGRAMMING 2500.0 Codeforces round #649 editorial 2700
1348 Odd Mineral Resource bitmasks data structures hashing probabilities trees Statement D Codeforces Round 700 (Div. 1) {1479} PROGRAMMING 2250.0 Editorial of Codeforces Round #700
2491 Love-Hate bitmasks brute force dp probabilities Statement D Deltix Round, Spring 2021 (open for everyone, rated, Div. 1 + Div. 2) {1523} PROGRAMMING 2250.0 Deltix Round, Spring 2021. Editorial 2400
1000 Bingo bitmasks dp probabilities Statement F Codeforces Round 733 (Div. 1 + Div. 2, based on VK Cup 2021 - Elimination (Engine)) {1530} PROGRAMMING 2750.0 Codeforces Round #733 Editorial (all problems)
1423 Sports Betting bitmasks combinatorics dp graphs math probabilities Statement F Deltix Round, Summer 2021 (open for everyone, rated, Div. 1 + Div. 2) {1556} PROGRAMMING 2500.0 94384 2500
1520 Two Arrays bitmasks brute force combinatorics hashing probabilities two pointers Statement D Codeforces Round 773 (Div. 1) {1641} PROGRAMMING 1750.0 Codeforces Round #773 editorial
698 Mark and the Online Exam bitmasks constructive algorithms interactive math probabilities Statement F Codeforces Round 807 (Div. 2) {1705} PROGRAMMING 3000.0 Codeforces Round #807 (Div 2.) Editorial
1572 Hossam and Range Minimum Query binary search bitmasks data structures hashing probabilities strings trees Statement F Codeforces Round 837 (Div. 2) {1771} PROGRAMMING 3500.0 Codeforces Round #837 (Div. 2) Editorial
556 Game of Questions bitmasks dp math probabilities Statement G 2022-2023 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1773} PROGRAMMING 2800
4750 Score of a Tree bitmasks combinatorics dfs and similar dp probabilities trees Statement D Codeforces Round 845 (Div. 2) and ByteRace 2023 {1777} PROGRAMMING 2000.0 Codeforces Round #845 (Div. 2) and ByteRace 2023 Editorial
1174 Twin Clusters bitmasks math meet-in-the-middle probabilities Statement C Codeforces Round 880 (Div. 1) {1835} PROGRAMMING 1500.0 Codeforces Round 880 Editorial
861 Tenzing and Random Real Numbers 2-sat bitmasks dp probabilities Statement H CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!) {1842} PROGRAMMING 3750.0 CodeTON Round 5 Editorial
3077 Guess Game bitmasks combinatorics constructive algorithms data structures games math probabilities strings trees Statement E Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) {1864} PROGRAMMING 2000.0 Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) Editorial
4010 Expected Power bitmasks brute force dp math number theory probabilities Statement E Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 {2020} PROGRAMMING 2000.0 Tutorial for Codeforces Round 976 (Div. 2) and Divide By Zero 9.0
4122 Math Division bitmasks dp math probabilities Statement A Codeforces Round 1010 (Div. 1, Unrated) {2081} PROGRAMMING 500.0 Codeforces Round 1010 (Div. 1, Div. 2, based on Zhili Cup 2025) Editorial
114 Inter Active (Hard Version) binary search bitmasks constructive algorithms graphs implementation interactive math probabilities Statement G2 Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} PROGRAMMING 2750.0 Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial
1252 Prime Gaming (Hard Version) bitmasks combinatorics dp probabilities Statement E2 Codeforces Round 1049 (Div. 2) {2140} PROGRAMMING 1000.0 Codeforces Round 1049 (Div. 2) Editorial
814 Interval Game bitmasks combinatorics dp games greedy math probabilities Statement F Codeforces Round 1091 (Div. 2) and CodeCraft 26 {2217} PROGRAMMING 2750.0 Tutorial