Problemset - Codeforces

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Educational Codeforces Round 81 (Rated for Div. 2)
04:50:54
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bitmasks

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Problems

#	Name
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3400	x27
1288D	Minimax Problem binary search, bitmasks, dp	2000	x2583
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1800	x3124
1270C	Make Good bitmasks, constructive algorithms, math	1500	x6887
1261F	Xor-Set bitmasks, divide and conquer, math	3100	x105
1257F	Make Them Similar bitmasks, brute force, hashing, meet-in-the-middle	2400	x1040
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x860
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x951
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3000	x132
1225C	p-binary bitmasks, brute force, math	1600	x4809
1238E	Keyboard Purchase bitmasks, dp	2200	x1341
1234F	Yet Another Substring Reverse bitmasks, dp	2400	x1202
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x193
1220D	Alex and Julian bitmasks, math, number theory	1900	x2318
1215E	Marbles bitmasks, dp	2200	x1455
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2400	x851
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1564
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1600	x4353
1214G	Feeling Good bitmasks, data structures	3100	x117
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x780
1207E	XOR Guessing bitmasks, interactive, math	1800	x3127
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x3708
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x5362
1194E	Count The Rectangles bitmasks, brute force, data structures, geometry, sortings	2200	x1050
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x1426
1185F	Two Pizzas bitmasks, brute force	2200	x1089
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x2844
1148F	Foo Fighters bitmasks, constructive algorithms	2500	x484
1168C	And Reachability bitmasks, dp	2400	x1262
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2000	x1705
1163E	Magical Permutation bitmasks, brute force, constructive algorithms, data structures, graphs, math	2800	x287
1152F2	Neko Rules the Catniverse (Large Version) bitmasks, dp, matrices	2900	x133
1152F1	Neko Rules the Catniverse (Small Version) bitmasks, dp, matrices	2900	x154
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x5615
1146E	Hot is Cold bitmasks, data structures, divide and conquer, implementation	2400	x490
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2150
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x4957
1145C	Mystery Circuit bitmasks, brute force		x562
1144E	Median String bitmasks, math, number theory, strings	1900	x2478
1117F	Crisp String bitmasks, dp	2600	x235
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x877
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2500	x871
1103D	Professional layer bitmasks, dp	3000	x181
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x974
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2400	x883
1097H	Mateusz and an Infinite Sequence bitmasks, brute force, dp, strings	3000	x44
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2400	x687
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x9594
1095C	Powers Of Two bitmasks, greedy	1400	x6592
1093G	Multidimensional Queries bitmasks, data structures	2200	x956
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x1648
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x927
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x1078
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x203
1030E	Vasya and Good Sequences bitmasks, dp	2100	x1841
1034E	Little C Loves 3 III bitmasks, dp, math	3200	x103
1051D	Bicolorings bitmasks, dp	1700	x3761
1042B	Vitamins bitmasks, brute force, dp, implementation	1200	x6275
1036G	Sources and Sinks bitmasks, brute force, dfs and similar	2800	x208
1038E	Maximum Matching bitmasks, brute force, dfs and similar, dp, graphs	2400	x654
1027G	X-mouse in the Campus bitmasks, math, number theory	2800	x158
1017D	The Wu bitmasks, brute force, data structures	1900	x2340
1016G	Appropriate Team bitmasks, math, number theory	2800	x128
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2400	x1739
1009G	Allowed Letters bitmasks, flows, graph matchings, graphs, greedy	2500	x352
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x655
1004F	Sonya and Bitwise OR bitmasks, data structures, divide and conquer	2900	x196
993B	Open Communication bitmasks, brute force	1900	x1514
993C	Careful Maneuvering bitmasks, brute force, geometry	2100	x1040
986C	AND Graph bitmasks, dfs and similar, dsu, graphs	2300	x1194
981E	Addition on Segments bitmasks, data structures, divide and conquer, dp	2100	x1096
981D	Bookshelves bitmasks, dp, greedy	1800	x1984
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x957
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x2641
961C	Chessboard bitmasks, brute force, implementation	1400	x3787
959F	Mahmoud and Ehab and yet another xor task bitmasks, dp, math, matrices	2600	x612
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x2138
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x201
938F	Erasing Substrings bitmasks, dp, greedy	2600	x223
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2300	x901
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2500	x383
914F	Substrings in a String bitmasks, brute force, data structures, string suffix structures, strings	2900	x410
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x623
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	1700	x1200
913E	Logical Expression bitmasks, dp, shortest paths	2400	x557
913C	Party Lemonade bitmasks, dp, greedy	1600	x5082
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1400	x6024
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2400	x516
906C	Party bitmasks, brute force, dp, graphs	2300	x780
903F	Clear The Matrix bitmasks, dp	2400	x340
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2100	x1425
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x1824
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x866
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x2357
878D	Magic Breeding bitmasks	2900	x258
878A	Short Program bitmasks, constructive algorithms	1600	x3763
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x2164
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x1225
868D	Huge Strings bitmasks, brute force, dp, implementation, strings	2100	x688
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x2787

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