Problemset - Codeforces

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bitmasks

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Problems

#	Name
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x730
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1647
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x912
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x13011
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x20168
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4471
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x741
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x33683
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x709
1842B	Tenzing and Books bitmasks, greedy, math	1100	x17404
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x22607
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x167
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x1010
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7903
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x28891
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1634
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1192
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x19717
1805A	We Need the Zero bitmasks, brute force	800	x24254
1804H	Code Lock bitmasks, dp	3300	x190
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1483
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8672
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3965
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x285
1795G	Removal Sequences bitmasks, dfs and similar, graphs	2700	x690
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x6332
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x15331
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x728
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1699
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x871
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2374
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1517
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x5008
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1267
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x904
1778C	Flexible String bitmasks, brute force, strings	1600	x8358
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x977
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3553
1775C	Interesting Sequence bitmasks, math	1600	x10649
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x14147
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x391
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x1191
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x676
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x943
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x701
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15766
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7453
1748F	Circular Xor Reversal bitmasks, constructive algorithms	3000	x339
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2844
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4720
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x260
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10916
1741G	Kirill and Company bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths	2200	x1524
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x548
1739E	Cleaning Robot bitmasks, dp	2400	x1240
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x820
1732C2	Sheikh (Hard Version) binary search, bitmasks, brute force, greedy, implementation, two pointers	2100	x2594
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5989
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9710
1730F	Almost Sorted bitmasks, data structures, dp	2700	x561
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x468
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x15230
1725F	Field Photography bitmasks, data structures, sortings	2100	x994
1725D	Deducing Sortability binary search, bitmasks, math	2900	x129
1722G	Even-Odd XOR bitmasks, constructive algorithms, greedy	1500	x11493
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6705
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1875
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x6056
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1105
1715D	2+ doors 2-sat, bitmasks, graphs, greedy	1900	x5200
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x545
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1394
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x557
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x2782
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x154
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x618
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x2108
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10834
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19892
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x318
1698A	XOR Mixup bitmasks, brute force	800	x29414
1696A	NIT orz! bitmasks, greedy	800	x18879
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1228
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x18333
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x21778
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x18899
1680E	Moving Chips bitmasks, dp, greedy	2000	x3825
1679F	Formalism for Formalism bitmasks, dp, math	2600	x568
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1204
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x841
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x717
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x989
1670E	Hemose on the Tree bitmasks, constructive algorithms, dfs and similar, trees	2200	x1772
1669H	Maximal AND bitmasks, greedy, math	1300	x19083
1665E	MinimizOR bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers	2500	x1537
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x4026
1661B	Getting Zero bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths	1300	x17975
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1606
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x11004
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2589