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4066 Exposition binary search data structures dsu trees two pointers Statement E Codeforces Beta Round 6 (Дивизион 2) {6} PROGRAMMING Beta Round #6 - Разбор задач 1900
663 Lucky Tickets binary search data structures sortings two pointers Statement C Codeforces Beta Round 64 {70} PROGRAMMING Analysis Codeforces Beta Round #64 2200
623 Sereja and Straight Lines binary search data structures geometry sortings two pointers Statement D Codeforces Round 187 (Div. 1) {314} PROGRAMMING Codeforces Round #187 tutorial 2400
5920 Pair of Numbers binary search brute force data structures math two pointers Statement D Codeforces Round 209 (Div. 2) {359} PROGRAMMING Editorial Codeforces Round #209 (Div. 2) 2100
1776 Dima and Trap Graph binary search data structures dfs and similar dsu shortest paths two pointers Statement D Codeforces Round 214 (Div. 2) {366} PROGRAMMING Codeforces Round #214 (Div. 2) — Tutorial 2400
1196 Choosing Subtree is Fun binary search data structures dfs and similar trees two pointers Statement D Codeforces Round 219 (Div. 1) {372} PROGRAMMING 9944 2600
783 Mashmokh and Water Tanks binary search data structures greedy trees two pointers Statement D Codeforces Round 240 (Div. 1) {414} PROGRAMMING Codeforces Round #240 Editorial 2300
43228 Number of Ways binary search brute force data structures dp two pointers Statement C Codeforces Round 266 (Div. 2) {466} PROGRAMMING Editorial Codeforces Round #266 (Div. 2) 1700
4424 Strip binary search data structures dp two pointers Statement B Codeforces Round 278 (Div. 1) {487} PROGRAMMING Tutorial 2300
7605 Vasya and Basketball binary search brute force data structures implementation sortings two pointers Statement C Codeforces Round 281 (Div. 2) {493} PROGRAMMING Codeforces Round #281 (Div. 2) Editorial 1700
5709 R2D2 and Droid Army binary search data structures two pointers Statement D Codeforces Round 291 (Div. 2) {514} PROGRAMMING Codeforces Round #291 (Div. 2) Editorial 2100
41457 Queries about less or equal elements binary search data structures sortings two pointers Statement B Educational Codeforces Round 2 {600} PROGRAMMING Editorial 1300
13262 Longest k-Good Segment binary search data structures two pointers Statement D Educational Codeforces Round 5 {616} PROGRAMMING Editorial of Educational Codeforces Round 5 1700
660 Startup Funding binary search constructive algorithms data structures probabilities two pointers Statement E Manthan, Codefest 16 {633} PROGRAMMING Manthan, Codefest 16: Editorials 2400
1679 Santa Claus and Tangerines binary search data structures greedy two pointers Statement E Технокубок 2017 - Отборочный Раунд 3 {748} PROGRAMMING Codeforces Round 389 (Div.2) Editorial 2000
2453 Cartons of milk binary search data structures greedy sortings two pointers Statement D Codeforces Round 398 (Div. 2) {767} PROGRAMMING Codeforces Round #398 (Div. 2) Editorial 2000
331 Significant Cups *special binary search data structures two pointers Statement B VK Cup 2017 - Уайлд-кард раунд 1 {774} PROGRAMMING VK Cup 2017 — Уайлд-кард раунд 1 — Разбор 2300
6921 Alyona and Spreadsheet binary search data structures dp greedy implementation two pointers Statement C Codeforces Round 401 (Div. 2) {777} PROGRAMMING Problem analysis of Codeforces Round #401 (Div. 2) 1600
2737 Card Game Again binary search data structures number theory two pointers Statement E Educational Codeforces Round 24 {818} PROGRAMMING 52991 2000
7009 The Bakery binary search data structures divide and conquer dp two pointers Statement B Codeforces Round 426 (Div. 1) {833} PROGRAMMING Codeforces Round #426 Editorial 2200
1345 Bipartite Segments binary search data structures dfs and similar dsu graphs two pointers Statement C Codeforces Round 453 (Div. 1) {901} PROGRAMMING Codeforces Round #453 (Div. 1 & Div. 2) Editorial 2500
2458 Castle Defense binary search data structures greedy two pointers Statement G Educational Codeforces Round 40 (рейтинговый для Див. 2) {954} PROGRAMMING 58519 2100
4315 Pencils and Boxes binary search data structures dp greedy two pointers Statement E Educational Codeforces Round 44 (рейтинговый для Див. 2) {985} PROGRAMMING Educational Codeforces Round 44 Editorial 2000
26503 Three Parts of the Array binary search data structures two pointers Statement C Codeforces Round 498 (Div. 3) {1006} PROGRAMMING 60672 1300
620 Intervals of Intervals binary search data structures two pointers Statement D Codeforces Round 511 (Div. 1) {1034} PROGRAMMING Codeforces Round #511 Editorial 3500
10376 Coffee Break binary search data structures greedy two pointers Statement C Codeforces Round 509 (Div. 2) {1041} PROGRAMMING Codeforces Round #509 (Div. 2) Editorial 1500
6503 Glider binary search data structures two pointers Statement D Codeforces Round 509 (Div. 2) {1041} PROGRAMMING Codeforces Round #509 (Div. 2) Editorial 1700
3001 Range Deleting binary search combinatorics data structures two pointers Statement E Educational Codeforces Round 65 (рейтинговый для Див. 2) {1167} PROGRAMMING 67058 2100
2923 Irrigation binary search data structures implementation sortings trees two pointers Statement D Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 2100
8342 Yet Another Monster Killing Problem binary search data structures dp greedy sortings two pointers Statement D Educational Codeforces Round 76 (рейтинговый для Див. 2) {1257} PROGRAMMING Educational Codeforces Round 76 Editorial 1700
7466 Irreducible Anagrams binary search constructive algorithms data structures strings two pointers Statement B Codeforces Round 616 (Div. 1) {1290} PROGRAMMING 1000.0 Codeforces Round #616 Editorial 1900
35422 Pair of Topics binary search data structures sortings two pointers Statement D Codeforces Round 627 (Div. 3) {1324} PROGRAMMING Codeforces Round #627 (Div. 3) Editorial
13695 Eugene and an array binary search data structures hashing implementation two pointers Statement C Codeforces Round 632 (Div. 2) {1333} PROGRAMMING 1250.0 Codeforces Round #632 (Div. 2) editorial
11870 Three Blocks Palindrome (easy version) binary search brute force data structures dp two pointers Statement E1 Codeforces Round 634 (Div. 3) {1335} PROGRAMMING 75993 1700
6411 Multiple Testcases binary search constructive algorithms data structures greedy sortings two pointers Statement D Educational Codeforces Round 86 (рейтинговый для Див. 2) {1342} PROGRAMMING 76633 1900
1142 Reading Books (hard version) binary search data structures greedy sortings ternary search two pointers Statement E2 Codeforces Round 653 (Div. 3) {1374} PROGRAMMING 79517
6211 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
1500 Controversial Rounds binary search data structures dp dsu two pointers Statement F Educational Codeforces Round 93 (рейтинговый для Див. 2) {1398} PROGRAMMING Educational Codeforces Round 93 Editorial
2605 Weights Division (hard version) binary search data structures dfs and similar greedy trees two pointers Statement E2 Codeforces Round 661 (Div. 3) {1399} PROGRAMMING Codeforces Round #661 (Div. 3) Editorial
364 The Potion of Great Power *special binary search data structures graphs interactive sortings two pointers Statement A Central-European Olympiad in Informatics, CEOI 2020, Day 2 (IOI, Unofficial Mirror Contest, Unrated) {1403} PROGRAMMING CEOI 2020 Online Mirror — Day 2 Tutorial
17735 k-Amazing Numbers binary search data structures implementation two pointers Statement A Codeforces Round 673 (Div. 1) {1416} PROGRAMMING 500.0 Codeforces Round #673 Editorial 1500
2999 Complicated Computations binary search data structures sortings two pointers Statement E Codeforces Round 678 (Div. 2) {1436} PROGRAMMING 2500.0 Codeforces Round #678 (Div. 2). Editorial
4991 Array Partition binary search brute force data structures greedy two pointers Statement F Codeforces Round 686 (Div. 3) {1454} PROGRAMMING Codeforces Round #686 (Div. 3) Editorial
996 Strange Permutation binary search combinatorics data structures dp two pointers Statement E Codeforces Round 694 (Div. 1) {1470} PROGRAMMING 2000.0 86464
9140 Correct Placement binary search data structures sortings two pointers Statement E Codeforces Round 693 (Div. 3) {1472} PROGRAMMING Codeforces Round #693 (Div. 3) Editorial
10434 Max Median binary search data structures dp two pointers Statement D Codeforces Round 703 (Div. 2) {1486} PROGRAMMING 1750.0 Codeforces Round #703 (Div. 2) Editorial
36146 Number of Pairs binary search data structures math two pointers Statement C Codeforces Round 725 (Div. 3) {1538} PROGRAMMING Codeforces Round #725 (Div. 3) Editorial
12912 PriceFixed binary search data structures greedy sortings two pointers Statement D Codeforces Round 727 (Div. 2) {1539} PROGRAMMING 1500.0 tutorial 1600
7317 Array Stabilization (GCD version) binary search constructive algorithms data structures number theory two pointers Statement F Codeforces Round 731 (Div. 3) {1547} PROGRAMMING Codeforces Round #731 (Div. 3) Editorial
11717 Integers Have Friends binary search data structures math number theory two pointers Statement B Codeforces Round 736 (Div. 1) {1548} PROGRAMMING 1000.0 Codeforces Round 736 Editorial
1971 Stringforces binary search bitmasks data structures dp greedy strings two pointers Statement E Educational Codeforces Round 111 (рейтинговый для Див. 2) {1550} PROGRAMMING Educational Codeforces Round 111 Editorial
4775 Boring Segments binary search data structures sortings two pointers Statement E Educational Codeforces Round 112 (Rated for Div. 2) {1555} PROGRAMMING 93389 2100
7637 ATM and Students binary search data structures two pointers Statement F Codeforces Round 756 (Div. 3) {1611} PROGRAMMING Tutorial 1700
6551 Range and Partition binary search data structures greedy two pointers Statement B Codeforces Round 768 (Div. 1) {1630} PROGRAMMING 1250.0 Editorial of Codeforces Round #768
5470 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
43249 Eating Candies binary search data structures greedy two pointers Statement F Codeforces Round 784 (Div. 4) {1669} PROGRAMMING 102101 1100
7883 Max GEQ Sum binary search constructive algorithms data structures divide and conquer implementation sortings two pointers Statement D CodeCraft-22 and Codeforces Round 795 (Div. 2) {1691} PROGRAMMING 1750.0 Editorial for CodeCraft-22 and Codeforces Round #795 (Div. 2)
14484 Fighting Tournament binary search data structures implementation two pointers Statement C Codeforces Round 814 (Div. 2) {1719} PROGRAMMING 1250.0 Codeforces Round #814 (Div. 1, Div. 2) Editorial
8698 Valiant's New Map binary search brute force data structures dp two pointers Statement D Codeforces Round 841 (Div. 2) and Divide by Zero 2022 {1731} PROGRAMMING 1500.0 Codeforces Round #841 (Div. 2) and Divide By Zero 2022 Editorial
16712 Good Subarrays (Easy Version) binary search data structures two pointers Statement C1 Codeforces Round 825 (Div. 2) {1736} PROGRAMMING 1250.0 Codeforces Round #825 (Div. 2) Editorial
1507 Good Subarrays (Hard Version) binary search data structures two pointers Statement C2 Codeforces Round 825 (Div. 2) {1736} PROGRAMMING 2000.0 Codeforces Round #825 (Div. 2) Editorial
1487 Comfortably Numb binary search bitmasks data structures divide and conquer dsu strings trees two pointers Statement F Codeforces Round 845 (Div. 2) and ByteRace 2023 {1777} PROGRAMMING 2750.0 Codeforces Round #845 (Div. 2) and ByteRace 2023 Editorial
1467 Rectangle Shrinking binary search data structures greedy implementation two pointers Statement E VK Cup 2022 - Отборочный раунд (Engine) {1781} PROGRAMMING 2750.0 Tutorial
2824 Petya, Petya, Petr, and Palindromes binary search data structures two pointers Statement D Codeforces Round 861 (Div. 2) {1808} PROGRAMMING 1750.0 Codeforces Round #861 (Div. 2) editorial 2100
2226 Vlad and the Nice Paths (hard version) binary search combinatorics data structures dp math two pointers Statement G2 Codeforces Round 863 (Div. 3) {1811} PROGRAMMING 114788
2907 MEX of LCM binary search brute force data structures implementation math number theory two pointers Statement E Codeforces Round 879 (Div. 2) {1834} PROGRAMMING 2500.0 Codeforces Round #879 Editorial
2317 Max to the Right of Min binary search data structures divide and conquer dsu two pointers Statement E Educational Codeforces Round 152 (Rated for Div. 2) {1849} PROGRAMMING 118752
3272 Trees and Segments binary search brute force constructive algorithms data structures dp greedy two pointers Statement D Codeforces Round 893 (Div. 2) {1858} PROGRAMMING 2000.0 Codeforces Round #893 (Div. 2) Editorial 2200
8102 Andrey and Escape from Capygrad binary search data structures dp dsu greedy sortings two pointers Statement D Codeforces Round 892 (Div. 2) {1859} PROGRAMMING 1750.0 Video solutions from Geothermal.
13342 Colorful Table binary search data structures dp implementation math sortings two pointers Statement C CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!) {1870} PROGRAMMING 1500.0 CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!) Editorial
1332 Split binary search data structures divide and conquer math two pointers Statement D Codeforces Round 905 (Div. 1) {1887} PROGRAMMING 1250.0 Codeforces Round #905 (Div. 1, Div. 2, Div. 3) Editorial
5879 Set To Max (Hard Version) binary search constructive algorithms data structures dsu greedy implementation sortings two pointers Statement D2 Codeforces Round 914 (Div. 2) {1904} PROGRAMMING 750.0 Codeforces Round 914 (Div. 2) Editorial
4783 Cyclic MEX binary search constructive algorithms data structures implementation math two pointers Statement D Codeforces Round 915 (Div. 2) {1905} PROGRAMMING 2000.0 Codeforces Round 915 (Div. 2) Editorial
6517 Blocking Elements binary search data structures dp greedy implementation two pointers Statement D Codeforces Round 922 (Div. 2) {1918} PROGRAMMING 2000.0 Codeforces Round #922 (Div. 2) Editorial
36059 Find the Different Ones! binary search brute force data structures dp greedy two pointers Statement D Codeforces Round 923 (Div. 3) {1927} PROGRAMMING 125597
17188 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
4494 Cutting Game binary search brute force data structures implementation sortings two pointers Statement F Codeforces Round 946 (Div. 3) {1974} PROGRAMMING Codeforces Round #946 (Div. 3) Editorial 1900
5965 Invertible Bracket Sequences binary search combinatorics data structures divide and conquer implementation two pointers Statement D Educational Codeforces Round 166 (Rated for Div. 2) {1976} PROGRAMMING Educational Codeforces Round 166 Editorial
1871 Manhattan Triangle binary search constructive algorithms data structures geometry graphs two pointers Statement E Codeforces Round 951 (Div. 2) {1979} PROGRAMMING 2500.0 Codeforces Round 951 (Div. 2) Editorial
22409 Boring Day binary search data structures dp greedy two pointers Statement C Codeforces Round 955 (Div. 2, с призами от NEAR!) {1982} PROGRAMMING 1000.0 130839
1614 array-value binary search bitmasks data structures two pointers Statement F Codeforces Round 956 (Div. 2) and ByteRace 2024 {1983} PROGRAMMING 2500.0
14050 Hungry Games binary search data structures dp two pointers Statement C Codeforces Round 959 при поддержке NEAR (Div. 1 + Div. 2) {1994} PROGRAMMING 1250.0 Video Tutorial
10347 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
2123 Eri and Expanded Sets binary search data structures number theory two pointers Statement C Codeforces Round 969 (Div. 1) {2006} PROGRAMMING 1500.0 Tutorial
1957 The Endspeaker (Hard Version) binary search combinatorics data structures dp greedy implementation two pointers Statement D2 Codeforces Round 982 (Div. 2) {2027} PROGRAMMING 1000.0 Codeforces Round #982 (Div. 2) Editorial
1229 Orangutan Approved Subarrays binary search brute force data structures greedy two pointers Statement F Codeforces Round 979 (Div. 2) {2030} PROGRAMMING 2500.0 Codeforces Round 979 Editorial
6374 Genokraken binary search constructive algorithms data structures graphs interactive trees two pointers Statement D Codeforces Round 983 (Div. 2) {2032} PROGRAMMING 1750.0 Codeforces Round 983 (Div. 2) Editorial
5960 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
3062 Ardent Flames binary search data structures sortings two pointers Statement F Codeforces Round 988 (Div. 3) {2037} PROGRAMMING Video Tutorial
8583 Kevin and Competition Memories binary search data structures greedy sortings two pointers Statement D Codeforces Global Round 28 {2048} PROGRAMMING 1250.0 Tutorial
2319 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
5202 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
6035 Eating binary search bitmasks data structures greedy two pointers Statement D Codeforces Round 1005 (Div. 2) {2064} PROGRAMMING 1750.0 Codeforces Round 1005 (Div. 2) Editorial
739 We Be Summing binary search data structures two pointers Statement F Codeforces Round 1005 (Div. 2) {2064} PROGRAMMING 2750.0 Codeforces Round 1005 (Div. 2) Editorial
3346 Canteen (Easy Version) binary search data structures flows greedy two pointers Statement B1 Codeforces Round 1012 (Div. 1) {2089} PROGRAMMING 1000.0 Codeforces Round 1012 (Div.1, Div. 2, based on THUPC 2025 — Finals) Editorial
1348 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
4056 Shorten the Array binary search brute force data structures dfs and similar greedy strings trees two pointers Statement G Codeforces Round 1016 (Div. 3) {2093} PROGRAMMING Codeforces Round 1016 (Div. 3) Editorial
4924 23 Kingdom binary search data structures greedy ternary search two pointers Statement C Codeforces Round 1024 (Div. 1) {2101} PROGRAMMING 2000.0 142788
15453 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
1247 Big Wins! (hard version) binary search data structures divide and conquer two pointers Statement G2 Codeforces Round 1037 (Div. 3) {2126} PROGRAMMING 144845
831 Submedians (Hard Version) binary search constructive algorithms data structures two pointers Statement E2 Codeforces Round 1039 (Div. 2) {2128} PROGRAMMING 1750.0 Codeforces Round #1039 — Editorial
4858 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
6895 Inversion Graph Coloring (Easy Version) binary search data structures dp two pointers Statement D1 Codeforces Round 1051 (Div. 2) {2143} PROGRAMMING 1750.0 Codeforces Round 1051 (Div. 2) Editorial
3056 Inversion Graph Coloring (Hard Version) binary search data structures dp two pointers Statement D2 Codeforces Round 1051 (Div. 2) {2143} PROGRAMMING 1000.0 Codeforces Round 1051 (Div. 2) Editorial
2283 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
2923 Locked Out binary search data structures dp graphs greedy implementation two pointers Statement D Pinely Round 5 (Div. 1 + Div. 2) {2161} PROGRAMMING 2250.0
3919 Zhily and Barknights binary search data structures dp math sortings two pointers Statement B Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026) {2223} PROGRAMMING 750.0 Codeforces Round 1097 (Div. 1, Div2, Based on Zhili Cup 2026) Tutorial
8392 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
14604 Palindromex binary search brute force constructive algorithms data structures greedy implementation two pointers Statement D Codeforces Round 1096 (Div. 3) {2227} PROGRAMMING Codeforces Round 1096 (Div. 3) — Editorial
1534 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
1384 Revival binary search constructive algorithms data structures math two pointers Statement C Codeforces Round 1105 (Div. 1) {2239} PROGRAMMING 1500.0 Codeforces Round 1105 (Div. 1, Div. 2) Editorial