Problemset - Codeforces

→ Pay attention

Contest is running
2023 Post World Finals Online ICPC Challenge powered by Huawei
11 days
Register now »

Before contest
Codeforces Round 944 (Div. 4)
14:38:15
Register now »

→ Filter Problems

Difficulty: —

bitmasks

Add tag

Problems

#	Name
707D	Persistent Bookcase bitmasks, data structures, dfs and similar, implementation	2200	x2596
768E	Game of Stones bitmasks, dp, games	2100	x2641
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2664
817E	Choosing The Commander bitmasks, data structures, trees	2000	x2691
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2703
1209E1	Rotate Columns (easy version) bitmasks, brute force, dp, greedy, sortings	2000	x2716
1238E	Keyboard Purchase bitmasks, dp	2200	x2739
525E	Anya and Cubes binary search, bitmasks, brute force, dp, math, meet-in-the-middle	2100	x2749
1088D	Ehab and another another xor problem bitmasks, constructive algorithms, implementation, interactive	2000	x2760
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2782
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2794
766E	Mahmoud and a xor trip bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees	2100	x2821
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x2833
1605D	Treelabeling bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees	2100	x2838
792D	Paths in a Complete Binary Tree bitmasks, trees	1900	x2903
1215E	Marbles bitmasks, dp	2200	x2917
1030E	Vasya and Good Sequences bitmasks, dp	2000	x2967
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x2978
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2987
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2990
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3071
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3121
1331C	...And after happily lived ever they *special problem, bitmasks		x3134
981D	Bookshelves bitmasks, dp, greedy	1900	x3166
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3213
1392E	Omkar and Duck bitmasks, constructive algorithms, interactive, math	2100	x3236
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3241
8C	Looking for Order bitmasks, dp	2000	x3248
959E	Mahmoud and Ehab and the xor-MST bitmasks, dp, graphs, implementation, math	1900	x3304
1017D	The Wu bitmasks, brute force, data structures	1900	x3337
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3339
282E	Sausage Maximization bitmasks, data structures, trees	2200	x3355
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3391
581D	Three Logos bitmasks, brute force, constructive algorithms, geometry, implementation, math	1700	x3423
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3454
1316E	Team Building bitmasks, dp, greedy, sortings	2300	x3476
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3499
1146C	Tree Diameter bitmasks, graphs, interactive	1700	x3523
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x3531
1680E	Moving Chips bitmasks, dp, greedy	2000	x3632
1220D	Alex and Julian bitmasks, math, number theory	1900	x3688
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3691
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3692
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3696
1600J	Robot Factory bitmasks, dfs and similar	1400	x3775
243A	The Brand New Function bitmasks	1600	x3787
960C	Subsequence Counting bitmasks, constructive algorithms, greedy, implementation	1700	x3813
888G	Xor-MST bitmasks, constructive algorithms, data structures	2300	x3886
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x3947
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3970
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4000
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4028
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4051
1144E	Median String bitmasks, math, number theory, strings	1900	x4054
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4067
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4087
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4181
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4194
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4198
877E	Danil and a Part-time Job bitmasks, data structures, trees	2000	x4249
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4283
244B	Undoubtedly Lucky Numbers bitmasks, brute force, dfs and similar	1600	x4377
11D	A Simple Task bitmasks, dp, graphs	2200	x4458
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4488
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4523
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4524
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4597
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4644
16E	Fish bitmasks, dp, probabilities	1900	x4646
1006F	Xor-Paths bitmasks, brute force, dp, meet-in-the-middle	2100	x4671
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x4726
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4762
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x4920
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4932
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4972
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5063
812B	Sagheer, the Hausmeister bitmasks, brute force, dp	1600	x5071
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5124
27B	Tournament bitmasks, brute force, dfs and similar, greedy	1300	x5143
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x5176
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5181
510D	Fox And Jumping bitmasks, brute force, dp, math	1900	x5182
620E	New Year Tree bitmasks, data structures, trees	2100	x5196
961C	Chessboard bitmasks, brute force, implementation	1400	x5228
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5252
878A	Short Program bitmasks, constructive algorithms	1600	x5267
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5301
1624G	MinOr Tree bitmasks, dfs and similar, dsu, graphs, greedy	1900	x5538
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5562
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5567
1207E	XOR Guessing bitmasks, interactive, math	1900	x5604
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5667
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5722
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5881
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x5914
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x5928
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5999
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6146
165E	Compatible Numbers bitmasks, brute force, dfs and similar, dp	2200	x6195
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6281