Problemset - Codeforces

→ Pay attention

Before contest
Technocup 2021 - Elimination Round 2
08:56:10
Register now »

Before contest
Codeforces Round #687 (Div. 1, based on Technocup 2021 Elimination Round 2)
08:56:10
Register now »

*has extra registration

Before contest
Codeforces Round #687 (Div. 2, based on Technocup 2021 Elimination Round 2)
08:56:10
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

bitmasks

Add tag

Problems

#	Name
1421A	XORwice bitmasks, greedy, math	800	x14153
202A	LLPS binary search, bitmasks, brute force, greedy, implementation, strings	800	x8091
579A	Raising Bacteria bitmasks	1000	x24535
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x19764
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x13215
1202A	You Are Given Two Binary Strings... bitmasks, greedy	1100	x6426
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x13249
1097B	Petr and a Combination Lock bitmasks, brute force, dp	1200	x12665
1420B	Rock and Lever bitmasks, math	1200	x12319
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x9540
1042B	Vitamins bitmasks, brute force, dp, implementation	1200	x8110
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x16232
96B	Lucky Numbers (easy) binary search, bitmasks, brute force	1300	x7528
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x7061
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x6689
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x6562
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x2911
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x11800
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x10706
550B	Preparing Olympiad bitmasks, brute force	1400	x10026
1270C	Make Good bitmasks, constructive algorithms, math	1400	x8942
1095C	Powers Of Two bitmasks, greedy	1400	x8687
961C	Chessboard bitmasks, brute force, implementation	1400	x4270
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x10653
437B	The Child and Set bitmasks, greedy, implementation, sortings	1500	x5775
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x4909
224B	Array bitmasks, implementation, two pointers	1500	x4774
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x3308
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x2311
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x8420
1151B	Dima and a Bad XOR bitmasks, brute force, constructive algorithms, dp	1600	x6469
1225C	p-binary bitmasks, brute force, math	1600	x6124
913C	Party Lemonade bitmasks, dp, greedy	1600	x5935
878A	Short Program bitmasks, constructive algorithms	1600	x4227
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x4100
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x3056
243A	The Brand New Function bitmasks	1600	x2782
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1586
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x7822
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x7678
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x7422
276D	Little Girl and Maximum XOR bitmasks, dp, greedy, implementation, math	1700	x7374
484A	Bits bitmasks, constructive algorithms	1700	x6964
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x6351
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x6000
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x5345
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x4943
1051D	Bicolorings bitmasks, dp	1700	x4658
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3028
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x2688
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x2536
442A	Borya and Hanabi bitmasks, brute force, implementation	1700	x1779
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x1751
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x5905
580D	Kefa and Dishes bitmasks, dp	1800	x5600
706D	Vasiliy's Multiset binary search, bitmasks, data structures, trees	1800	x5247
888E	Maximum Subsequence bitmasks, divide and conquer, meet-in-the-middle	1800	x3179
513B2	Permutations bitmasks, divide and conquer, math	1800	x2347
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x1832
1285D	Dr. Evil Underscores bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees	1900	x4781
1303D	Fill The Bag bitmasks, greedy	1900	x4562
1205B	Shortest Cycle bitmasks, brute force, graphs, shortest paths	1900	x4513
1207E	XOR Guessing bitmasks, interactive, math	1900	x3838
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x3440
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x3381
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x3323
1144E	Median String bitmasks, math, number theory, strings	1900	x2912
1220D	Alex and Julian bitmasks, math, number theory	1900	x2850
1017D	The Wu bitmasks, brute force, data structures	1900	x2559
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x2531
981D	Bookshelves bitmasks, dp, greedy	1900	x2362
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2174
16E	Fish bitmasks, dp, probabilities	1900	x1981
388B	Fox and Minimal path bitmasks, constructive algorithms, graphs, implementation, math	1900	x1876
993B	Open Communication bitmasks, brute force	1900	x1656
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x1563
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1427
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1269
232B	Table bitmasks, combinatorics, dp, math	1900	x1080
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x739
1288D	Minimax Problem binary search, bitmasks, dp	2000	x3997
242E	XOR on Segment bitmasks, data structures	2000	x3774
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x3386
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x3017
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x2575
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x2554
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x2375
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x2212
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2148
8C	Looking for Order bitmasks, dp	2000	x2025
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x1912
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x1874
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x1794
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x1420
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1341
513C	Second price auction bitmasks, probabilities	2000	x1302
379D	New Year Letter bitmasks, brute force, dp	2000	x1244
817E	Choosing The Commander bitmasks, data structures, trees	2000	x1233
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1112
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x504

←