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18703 Longest Regular Bracket Sequence constructive algorithms data structures dp greedy sortings strings Statement C Codeforces Beta Round 5 {5} PROGRAMMING C, D и E с CBR5 - разбор 1900
2110 Big Maximum Sum data structures dp greedy implementation math trees Statement D Codeforces Beta Round 67 (Div. 2) {75} PROGRAMMING Codeforces Beta Round #67 (Div. 2) Editorial 2100
15222 Color the Fence data structures dp greedy implementation Statement B Codeforces Round 202 (Div. 2) {349} PROGRAMMING Editorial for Codeforces Round #202 1700
2713 LIS of Sequence data structures dp greedy hashing math Statement E Codeforces Round 277 (Div. 2) {486} PROGRAMMING Codeforces Round #277(Div. 2) Editorial 2400
4231 Arthur and Table brute force data structures dp greedy math sortings Statement C Codeforces Round 311 (Div. 2) {557} PROGRAMMING Codeforces Round #311 (Div.2) Editorial 1900
752 Raffles data structures dp greedy math Statement G 8VC Venture Cup 2016 - Elimination Round {626} PROGRAMMING 23522 3000
2514 Maxim and Array constructive algorithms data structures greedy math Statement D Codeforces Round 374 (Div. 2) {721} PROGRAMMING Codeforces Round #374 (Div. 2) Editorial 2000
4464 Cashback data structures dp greedy math Statement E Codeforces Round 466 (Div. 2) {940} PROGRAMMING [Editorial] Codeforces Round #466 (Div. 2) 2000
2233 Kuro and GCD and XOR and SUM binary search bitmasks brute force data structures dp dsu greedy math number theory strings trees Statement D Codeforces Round 482 (Div. 2) {979} PROGRAMMING 1750.0 Codeforces Round #482 (Div. 2) Editorial 2200
2071 Leaving the Bar brute force data structures geometry greedy math sortings Statement C Codeforces Round 492 (Div. 1) [Thanks, uDebug!] {995} PROGRAMMING Editorial for Codeforces Round #492 [Thanks u-Debug!] 2200
889 Timetable constructive algorithms data structures greedy math Statement A Codeforces Round 507 (Div. 1, based on Olympiad of Metropolises) {1039} PROGRAMMING 61668 2400
1108 New Year and the Acquaintance Estimation binary search data structures graphs greedy implementation math sortings Statement E Good Bye 2018 {1091} PROGRAMMING Editorial 2400
3835 Ivan and Burgers data structures divide and conquer greedy math Statement F Codeforces Round 532 (Div. 2) {1100} PROGRAMMING Unofficial Tutorial 2600
2295 Permutation recovery constructive algorithms data structures dfs and similar graphs greedy math sortings Statement C Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 2300
2517 Serge and Dining Room binary search data structures graph matchings greedy implementation math trees Statement C Codeforces Round 569 (Div. 1) {1179} PROGRAMMING Editorial of Round #569 2400
7853 Exam in BerSU (hard version) brute force data structures greedy math Statement C2 Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 1700
2793 You Are Given a WASD-string... brute force data structures dp greedy implementation math strings Statement C Educational Codeforces Round 70 (Rated for Div. 2) {1202} PROGRAMMING 68972 2100
3418 Kirk and a Binary String (hard version) data structures greedy math strings Statement D2 Codeforces Round 581 (Div. 2) {1204} PROGRAMMING 69244 2100
285 Moving Walkways data structures greedy math Statement H Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} PROGRAMMING 69791 3300
2099 Sum Queries? data structures greedy implementation math Statement E Educational Codeforces Round 72 (Rated for Div. 2) {1217} PROGRAMMING Educational Codeforces Round 72 Editorial 2300
3903 Decreasing Debts constructive algorithms data structures graphs greedy implementation math two pointers Statement D Codeforces Global Round 6 {1266} PROGRAMMING Codeforces Global Round 6 Editorial 2000
1794 Beautiful Rectangle brute force combinatorics constructive algorithms data structures greedy math Statement C Codeforces Round 606 (Div. 1, based on Technocup 2020 Elimination Round 4) {1276} PROGRAMMING Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial 2300
12776 MEX maximizing data structures greedy implementation math Statement D Codeforces Round 615 (Div. 3) {1294} PROGRAMMING Codeforces Round #615 (Div. 3) Editorial 1600
256 Dune II: Battle For Arrakis *special data structures greedy math Statement F Kotlin Heroes: Episode 4 {1346} PROGRAMMING Kotlin Heroes: Episode 4 — Editorial 2000
6154 Choosing flowers binary search data structures greedy math sortings two pointers Statement C Codeforces Round 657 (Div. 2) {1379} PROGRAMMING 1250.0 Codeforces Round #657 Editorial 2000
11089 Pinkie Pie Eats Patty-cakes binary search constructive algorithms data structures greedy math sortings Statement C Codeforces Round 662 (Div. 2) {1393} PROGRAMMING 1500.0 Codeforces Round #662 Editorial
2620 Two Types of Spells binary search data structures greedy implementation math sortings Statement E Educational Codeforces Round 93 (Rated for Div. 2) {1398} PROGRAMMING Educational Codeforces Round 93 Editorial
3847 Three Sequences binary search data structures greedy math Statement D Codeforces Round 670 (Div. 2) {1406} PROGRAMMING 2000.0 Codeforces Round #670 (Div. 2) Editorial
4325 Carrots for Rabbits binary search data structures greedy math Statement E Codeforces Raif Round 1 (Div. 1 + Div. 2) {1428} PROGRAMMING 1750.0 Codeforces Raif Round 1 Editorial
7516 Painting the Array I constructive algorithms data structures dp greedy implementation Statement B1 Codeforces Round 700 (Div. 1) {1479} PROGRAMMING 750.0 Editorial of Codeforces Round #700
4503 Painting the Array II data structures dp greedy implementation Statement B2 Codeforces Round 700 (Div. 1) {1479} PROGRAMMING 750.0 Editorial of Codeforces Round #700
18605 Equalize the Array binary search data structures greedy math sortings Statement F Codeforces Round 702 (Div. 3) {1490} PROGRAMMING Codeforces Round #702 (Div. 3) Editorial
21020 Card Deck data structures greedy math Statement B Codeforces Round 704 (Div. 2) {1492} PROGRAMMING 1000.0 Codeforces Round #704 Editorial
9167 Square-free division (easy version) data structures dp greedy math number theory Statement E1 Codeforces Round 708 (Div. 2) {1497} PROGRAMMING 1500.0 Codeforces Round #708 Editorial 1700
1949 Square-free division (hard version) data structures dp greedy hashing math number theory Statement E2 Codeforces Round 708 (Div. 2) {1497} PROGRAMMING 1500.0 Codeforces Round #708 Editorial 2500
1770 Complete the MST data structures dfs and similar dsu graphs greedy math Statement C Codeforces Round 715 (Div. 1) {1508} PROGRAMMING 1500.0 Codeforces Round #715 Editorial
4278 Pchelyonok and Segments binary search data structures dp greedy math Statement E Codeforces Round 750 (Div. 2) {1582} PROGRAMMING 2500.0 Codeforces Round #750 (Div.2) Editorial
551 A Stroll Around the Matrix data structures greedy math Statement G Deltix Round, Autumn 2021 (open for everyone, rated, Div. 1 + Div. 2) {1609} PROGRAMMING 3250.0 Deltix Round, Autumn 2021. Editorial 3000
1986 Trader Problem binary search data structures dsu greedy math sortings Statement G Codeforces Round 760 (Div. 3) {1618} PROGRAMMING Codeforces Round #760 (Div. 3) Editorial
10328 MEX and Increments constructive algorithms data structures dp greedy math sortings Statement E Codeforces Round 762 (Div. 3) {1619} PROGRAMMING Tutorial
5419 New Year Concert binary search data structures dp greedy math number theory two pointers Statement D Codeforces Round 769 (Div. 2) {1632} PROGRAMMING 2000.0 Editorial of Codeforces Round #769
4492 Rescheduling the Exam binary search data structures greedy implementation math sortings Statement E Codeforces Round 776 (Div. 3) {1650} PROGRAMMING 100712
4479 Reverse Sort Sum constructive algorithms data structures greedy implementation math two pointers Statement D Codeforces Round 782 (Div. 2) {1659} PROGRAMMING 2000.0 Codeforces Round #782 (Div. 2) Editorial
6317 Permutation Restoration binary search data structures greedy math sortings Statement D Educational Codeforces Round 131 (Rated for Div. 2) {1701} PROGRAMMING Educational Codeforces Round 131 Editorial
9575 Equate Multisets constructive algorithms data structures graph matchings greedy math number theory Statement F Codeforces Round 805 (Div. 3) {1702} PROGRAMMING 104763
3527 Fibonacci Strings brute force data structures greedy implementation math number theory Statement B Codeforces Round 814 (Div. 1) {1718} PROGRAMMING 1250.0 Codeforces Round #814 (Div. 1, Div. 2) Editorial
1882 Tonya and Burenka-179 brute force data structures greedy math number theory Statement C Codeforces Round 814 (Div. 1) {1718} PROGRAMMING 1250.0 Codeforces Round #814 (Div. 1, Div. 2) Editorial
5968 Burenka and Traditions (hard version) data structures dp greedy math two pointers Statement A2 Codeforces Round 814 (Div. 1) {1718} PROGRAMMING 500.0 Codeforces Round #814 (Div. 1, Div. 2) Editorial
22490 Interesting Sum data structures greedy math Statement B Codeforces Round 815 (Div. 2) {1720} PROGRAMMING 1000.0 Codeforces Round #815 (Div. 2) Editorial
18042 Minimum Notation data structures greedy math sortings Statement C Codeforces Round 823 (Div. 2) {1730} PROGRAMMING 1500.0 Codeforces Round #823 — editorial 1200
9142 Knowledge Cards constructive algorithms data structures greedy math Statement D Codeforces Round 831 (Div. 1 + Div. 2) {1740} PROGRAMMING 1750.0 Tutorial 1500
1697 Bracket Cost binary search data structures divide and conquer dp greedy strings Statement E CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} PROGRAMMING 2250.0 CodeTON Round 3 (Div. 1 + Div. 2) Editorial
5627 Restore the Permutation binary search data structures greedy math Statement G Codeforces Round 834 (Div. 3) {1759} PROGRAMMING 109254
4564 All Possible Digits binary search data structures greedy math number theory Statement F Codeforces Round 834 (Div. 3) {1759} PROGRAMMING 109254
23198 Binary Inversions data structures greedy math Statement E Codeforces Round 835 (Div. 4) {1760} PROGRAMMING 109348
12424 Recent Actions data structures greedy implementation math Statement A Codeforces Round 854 by cybercats (Div. 1 + Div. 2) {1799} PROGRAMMING 500.0 Codeforces Round #854 Editorial
2473 Fill the Matrix data structures greedy math Statement E Educational Codeforces Round 150 (Rated for Div. 2) {1841} PROGRAMMING 117262
6455 Omsk Metro (simple version) data structures dfs and similar dp greedy math trees Statement F1 Codeforces Round 881 (Div. 3) {1843} PROGRAMMING Codeforces Round #881 (Div. 3) Editorial
9155 Rating System brute force data structures dp greedy implementation math Statement D Educational Codeforces Round 151 (Rated for Div. 2) {1845} PROGRAMMING 117791
1102 The Boss's Identity binary search bitmasks data structures dfs and similar greedy math sortings Statement F Codeforces Round 882 (Div. 2) {1847} PROGRAMMING 3000.0 Tutorial
25950 Vika and the Bridge binary search data structures greedy implementation math sortings Statement B Codeforces Round 885 (Div. 2) {1848} PROGRAMMING 1000.0 Codeforces Round #885 (Div.2) Editorial
7750 Lisa and the Martians bitmasks data structures greedy math sortings strings trees Statement F Codeforces Round 888 (Div. 3) {1851} PROGRAMMING 118667
2139 Ina of the Mountain data structures dp greedy math Statement C Codeforces Round 887 (Div. 1) {1852} PROGRAMMING 1250.0 Codeforces Round 887 (Div 1, Div 2) Tutorial
13379 Heavy Intervals constructive algorithms data structures dsu greedy math sortings Statement C Pinely Round 3 (Div. 1 + Div. 2) {1909} PROGRAMMING 1500.0 Editorial of Pinely Round 3 (Div. 1 + Div. 2)
36368 Romantic Glasses data structures greedy math Statement E Codeforces Round 918 (Div. 4) {1915} PROGRAMMING 123952
2045 Paint Charges data structures dp greedy math Statement G Codeforces Round 923 (Div. 3) {1927} PROGRAMMING 125597
5239 Lonely Mountain Dungeons binary search brute force data structures greedy math ternary search Statement D Codeforces Round 924 (Div. 2) {1928} PROGRAMMING 1750.0 Codeforces Round 924 Editorial
1682 Distance Learning Courses in MAC binary search bitmasks data structures greedy implementation math Statement E Codeforces Round 932 (Div. 2) {1935} PROGRAMMING 2500.0 Codeforces Round #932 (Div. 2) Editorial
3017 Chain Reaction data structures dsu greedy implementation math number theory Statement E Educational Codeforces Round 164 (Rated for Div. 2) {1954} PROGRAMMING Educational Codeforces Round 164 Editorial
5779 Shop Game data structures greedy math sortings Statement D Educational Codeforces Round 165 (Rated for Div. 2) {1969} PROGRAMMING Educational Codeforces Round 165 Editorial 1900
17037 Cat, Fox and the Lonely Array binary search bitmasks data structures greedy math two pointers Statement B Codeforces Round 945 (Div. 2) {1973} PROGRAMMING 1000.0 Editorial for Codeforces Round #945 (Div. 2) 1300
1338 Splittable Permutations combinatorics data structures dfs and similar greedy math trees Statement E Educational Codeforces Round 166 (Rated for Div. 2) {1976} PROGRAMMING Educational Codeforces Round 166 Editorial
8146 Nikita and LCM brute force data structures dp greedy math number theory sortings Statement C Codeforces Round 948 (Div. 2) {1977} PROGRAMMING 1750.0 129858 1900
13852 Elections data structures greedy implementation math Statement D Codeforces Round 953 (Div. 2) {1978} PROGRAMMING 1500.0 130527
10271 Bouquet (Hard Version) binary search data structures greedy math sortings two pointers Statement B2 Codeforces Round 961 (Div. 2) {1995} PROGRAMMING 500.0 Video Tutorial
10420 Squaring brute force constructive algorithms data structures greedy implementation math number theory Statement C Codeforces Round 961 (Div. 2) {1995} PROGRAMMING 1750.0 Video Tutorial
2304 Eliminating Balls With Merging (Easy Version) binary search brute force data structures divide and conquer dp greedy math Statement E1 Codeforces Round 965 (Div. 2) {1998} PROGRAMMING 1750.0 Video Tutorial
16493 Photoshoot for Gorillas combinatorics data structures greedy math Statement E Codeforces Round 966 (Div. 3) {2000} PROGRAMMING 132689
1436 Make a Palindrome brute force data structures dp greedy math Statement F Educational Codeforces Round 169 (Rated for Div. 2) {2004} PROGRAMMING Educational Codeforces Round 169 Editorial
7615 Minimize the Difference binary search data structures greedy implementation math Statement D Codeforces Round 973 (Div. 2) {2013} PROGRAMMING 2000.0 134298
246 Complex Segments (Easy Version) binary search data structures divide and conquer dsu greedy math sortings Statement E1 Codeforces Round 975 (Div. 1) {2018} PROGRAMMING 2250.0 Editorial of Codeforces Round 975 (Div. 1, Div. 2)
210 Complex Segments (Hard Version) binary search data structures divide and conquer dsu greedy math sortings Statement E2 Codeforces Round 975 (Div. 1) {2018} PROGRAMMING 750.0 Editorial of Codeforces Round 975 (Div. 1, Div. 2)
1959 Digital Village (Easy Version) brute force data structures dp dsu graphs greedy implementation math shortest paths trees Statement E1 Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} PROGRAMMING 1750.0 Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial
709 Digital Village (Extreme Version) data structures dp graphs greedy math Statement E3 Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} PROGRAMMING 1000.0 Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial
973 Boss, Thirsty data structures dp greedy math Statement D Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} PROGRAMMING 2500.0 Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial
21761 Meaning Mean data structures greedy math sortings Statement A Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} PROGRAMMING 500.0 Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial
14454 Sakurako, Kosuke, and the Permutation brute force data structures dfs and similar dsu fft greedy math Statement E Codeforces Round 981 (Div. 3) {2033} PROGRAMMING 135520
5900 Yet Another Real Number Problem binary search brute force data structures dp greedy implementation math two pointers Statement D Codeforces Global Round 27 {2035} PROGRAMMING 1500.0 Codeforces Global Round 27 Editorial
157 Barrels data structures greedy math Statement E 2024-2025 ICPC, NERC, Southern and Volga Russian Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2038} PROGRAMMING 2900
11466 Sums on Segments binary search brute force data structures dp greedy math Statement C Educational Codeforces Round 173 (Rated for Div. 2) {2043} PROGRAMMING Educational Codeforces Round 173 Editorial
7807 Refined Product Optimality binary search data structures greedy implementation math schedules sortings Statement D Good Bye 2024: 2025 is NEAR {2053} PROGRAMMING 1750.0 Good Bye 2024: 2025 is NEAR Editorial
109 Affectionate Arrays (Hard Version) data structures dp graphs greedy math shortest paths two pointers Statement I2 Good Bye 2024: 2025 is NEAR {2053} PROGRAMMING 2000.0 Good Bye 2024: 2025 is NEAR Editorial
189 Coffee Break data structures greedy greedy math Statement H Hello 2025 {2057} PROGRAMMING 4500.0
5531 Gifts Order data structures greedy math Statement D Hello 2025 {2057} PROGRAMMING 2250.0
2297 Kevin and Binary String (Easy Version) binary search brute force data structures dp greedy implementation strings two pointers Statement F1 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) {2061} PROGRAMMING 2000.0 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) Editorial
14926 Kevin and Geometry brute force constructive algorithms data structures geometry greedy implementation math two pointers Statement B IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) {2061} PROGRAMMING 1000.0 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) Editorial
11018 Kevin and Numbers brute force data structures greedy implementation math Statement D IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) {2061} PROGRAMMING 1500.0 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) Editorial
5129 Game With Triangles binary search data structures dp greedy math ternary search two pointers Statement D Codeforces Round 1000 (Div. 2) {2063} PROGRAMMING 2250.0 Codeforces Round 1000 (Div. 2) — Editorial
1903 Game with Binary String data structures divide and conquer games greedy math Statement E Educational Codeforces Round 175 (Rated for Div. 2) {2070} PROGRAMMING Video Tutorial
1307 Canteen (Hard Version) binary search data structures greedy math two pointers Statement B2 Codeforces Round 1012 (Div. 1) {2089} PROGRAMMING 500.0 Codeforces Round 1012 (Div.1, Div. 2, based on THUPC 2025 — Finals) Editorial
1557 Gleb and Boating brute force constructive algorithms data structures dp graphs greedy math shortest paths Statement G Codeforces Round 1013 (Div. 3) {2091} PROGRAMMING Codeforces Round 1013 (Div. 3) Editorial
15296 MEX Count binary search data structures greedy sortings two pointers Statement E Codeforces Round 1034 (Div. 3) {2123} PROGRAMMING Codeforces Round 1034 (Div. 3) Editorial
4812 Unjust Binary Life binary search binary search data structures greedy greedy math two pointers Statement F Codeforces Round 1042 (Div. 3) {2131} PROGRAMMING Codeforces Round 1042 (Div. 3) Editorial
13392 Triple Removal data structures greedy math Statement C Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} PROGRAMMING 1500.0 Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial
1445 Inverse Minimum Partition (Easy Version) binary search data structures dp greedy math two pointers Statement D1 Codeforces Round 1058 (Div. 1) {2159} PROGRAMMING 1500.0 Codeforces Round 1058 Editorial
310 Fuzzy Concatenation (Easy Version) binary search bitmasks brute force data structures greedy string suffix structures Statement E1 Codeforces Round 1079 (Div. 1) {2196} PROGRAMMING 2000.0 Tutorial
237 Fuzzy Concatenation (Hard version) binary search data structures dp greedy string suffix structures Statement E2 Codeforces Round 1079 (Div. 1) {2196} PROGRAMMING 1000.0 Tutorial
1068 Double Bracket Sequence data structures dp greedy sortings Statement D Codeforces Round 1079 (Div. 1) {2196} PROGRAMMING 2250.0 Tutorial
7942 Mental Monumental (Easy Version) binary search data structures greedy math two pointers Statement C Codeforces Round 1095 (Div. 2) {2226} PROGRAMMING 1500.0 Codeforces Round 1095 (Div. 2) Editorial
997 Mental Monumental (Hard Version) data structures greedy math Statement E Codeforces Round 1095 (Div. 2) {2226} PROGRAMMING 2500.0 Codeforces Round 1095 (Div. 2) Editorial
4304 It Just Keeps Going Sideways data structures dp greedy math Statement F Codeforces Round 1096 (Div. 3) {2227} PROGRAMMING Codeforces Round 1096 (Div. 3) — Editorial
1431 Minimum Influence binary search data structures geometry greedy implementation math sortings two pointers Statement E Educational Codeforces Round 190 (Rated for Div. 2) {2230} PROGRAMMING Educational Codeforces Round 190 — Editorial
769 Summmon binary search data structures greedy math number theory Statement G Codeforces Round 1107 (Div. 3) {2241} PROGRAMMING
4075 A Bit Odd data structures games greedy math Statement F Codeforces Round 1107 (Div. 3) {2241} PROGRAMMING
15078 Predominant Frequency Division data structures greedy implementation math Statement B Educational Codeforces Round 192 (Rated for Div. 2) {2242} PROGRAMMING