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1645 Axis Walking bitmasks combinatorics constructive algorithms dp meet-in-the-middle Statement E Codeforces Round 191 (Div. 2) {327} PROGRAMMING Codeforces Round #191 — Tutorial 2500
1157 Bags and Coins bitmasks constructive algorithms dp greedy Statement D Codeforces Round 207 (Div. 1) {356} PROGRAMMING 9210 2500
1064 Guess the Tree bitmasks constructive algorithms dp greedy trees Statement C Codeforces Round 245 (Div. 1) {429} PROGRAMMING Codeforces Round #245 — Editorial 2400
3645 Mahmoud and a xor trip bitmasks constructive algorithms data structures dfs and similar dp math trees Statement E Codeforces Round 396 (Div. 2) {766} PROGRAMMING Codeforces round #396 editorial 2200
5072 Qualification Rounds bitmasks brute force constructive algorithms dp Statement C Codeforces Round 438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {868} PROGRAMMING 55046 1500
13196 Dima and a Bad XOR bitmasks brute force constructive algorithms dp Statement B Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 1600
680 To Make 1 bitmasks constructive algorithms dp greedy number theory Statement G Технокубок 2020 - Отборочный Раунд 2 {1225} PROGRAMMING 70898 3000
13756 Spy-string bitmasks brute force constructive algorithms dp hashing strings Statement F Codeforces Round 644 (Div. 3) {1360} PROGRAMMING Codeforces Round #644 (Div. 3) Editorial 1700
5612 GameGame bitmasks constructive algorithms dp games greedy math Statement B Codeforces Round 659 (Div. 1) {1383} PROGRAMMING 1000.0 Codeforces Round #659 Editorial
4511 Almost Sorted binary search bitmasks combinatorics constructive algorithms dp implementation math Statement B Codeforces Round 715 (Div. 1) {1508} PROGRAMMING 1000.0 Codeforces Round #715 Editorial
14575 Baby Ehab Partitions Again bitmasks constructive algorithms dp math Statement C Codeforces Round 717 (Div. 2) {1516} PROGRAMMING 1500.0 Codeforces round #717 editorial
5120 Nearest Beautiful Number (hard version) bitmasks brute force constructive algorithms dfs and similar dp greedy Statement F2 Codeforces Round 739 (Div. 3) {1560} PROGRAMMING 94009 2100
21522 MIN-MEX Cut bitmasks constructive algorithms dp Statement B Codeforces Global Round 16 {1566} PROGRAMMING 750.0 Codeforces Global Round 16 Editorial
19252 MAX-MEX Cut bitmasks constructive algorithms dp greedy Statement C Codeforces Global Round 16 {1566} PROGRAMMING 1000.0 Codeforces Global Round 16 Editorial
9426 Bakry and Partitioning bitmasks constructive algorithms dfs and similar dp graphs trees Statement C Codeforces Round 746 (Div. 2) {1592} PROGRAMMING 1500.0 95583
11494 Divan and bitwise operations bitmasks combinatorics constructive algorithms dp math Statement C Codeforces Round 757 (Div. 2) {1614} PROGRAMMING 1500.0 Tutorial 1500
2017 Hemose on the Tree bitmasks constructive algorithms dfs and similar trees Statement E Codeforces Round 788 (Div. 2) {1670} PROGRAMMING 2750.0 Tutorial 2200
187 Bugaboo bitmasks constructive algorithms dp number theory Statement F Codeforces Round 808 (Div. 1) {1707} PROGRAMMING 3250.0 104930
789 Lost Array bitmasks combinatorics constructive algorithms dp math Statement F Codeforces Round 812 (Div. 2) {1713} PROGRAMMING 3000.0 Codeforces Round #812 (Div. 2) Editorial 2900
3700 Balanced String bitmasks constructive algorithms dp Statement D Educational Codeforces Round 153 (Rated for Div. 2) {1860} PROGRAMMING Educational Codeforces Round 153 Editorial
2819 Candy Party (Hard Version) bitmasks constructive algorithms dp graphs greedy implementation math Statement B2 Codeforces Round 896 (Div. 1) {1868} PROGRAMMING 750.0 Codeforces Round 896 (Div. 1, Div. 2) Editorial
1278 Construct Tree bitmasks constructive algorithms dp trees Statement F Codeforces Round 917 (Div. 2) {1917} PROGRAMMING 3000.0 Editorial of Codeforces Round 917 (Div. 2)
2164 Vlad and Avoiding X bitmasks brute force constructive algorithms dfs and similar dp implementation Statement F Codeforces Round 928 (Div. 4) {1926} PROGRAMMING 126132
1573 The Most Reckless Defense bitmasks brute force constructive algorithms dp flows graph matchings Statement H Codeforces Round 938 (Div. 3) {1955} PROGRAMMING 128243
4891 Nene and the Mex Operator bitmasks brute force constructive algorithms divide and conquer dp greedy implementation Statement D Codeforces Round 939 (Div. 2) {1956} PROGRAMMING 1750.0 [Editorial] Codeforces Round 939 (Div. 2)
1137 Infinite Sequence (Hard Version) bitmasks constructive algorithms data structures dp implementation math Statement D2 Codeforces Round 1007 (Div. 2) {2071} PROGRAMMING 1250.0 Codeforces Round 1007 (Div. 2) Editorial
278 AND x OR bitmasks constructive algorithms dp Statement F Codeforces Round 1008 (Div. 1) {2077} PROGRAMMING 2500.0 Codeforces Round 1008 (Div. 1, Div. 2) Editorial
2249 Interactive RBS (Hard Version) binary search bitmasks constructive algorithms dp interactive Statement C3 Codeforces Round 1040 (Div. 1) {2129} PROGRAMMING 750.0 Codeforces Round 1040 (Div. 1, Div. 2) Editorial
6805 XOR-factorization bitmasks constructive algorithms dp greedy number theory Statement C Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} PROGRAMMING 1500.0 Codeforces Global Round 31
5730 Shortest Statement Ever bitmasks constructive algorithms dp greedy Statement B Codeforces Round 1077 (Div. 1) {2187} PROGRAMMING 1250.0 Codeforces Round 1077 (Div. 1, Div. 2) Editorial
1549 Product of Closures bitmasks brute force constructive algorithms dp greedy implementation math Statement E Educational Codeforces Round 192 (Rated for Div. 2) {2242} PROGRAMMING 155047