Problemset - Codeforces

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Codeforces Round #851 (Div. 2)
36:57:48
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Difficulty: —

number theory

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Problems

#	Name
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x751
1787B	Number Factorization greedy, math, number theory	1100	x9751
1783E	Game of the Year brute force, data structures, math, number theory	2300	x1488
1781D	Many Perfect Squares brute force, math, number theory	1800	x3748
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures		x351
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings		x806
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory		x820
1780B	GCD Partition brute force, greedy, math, number theory		x12031
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees		x288
1777C	Quiz Master binary search, math, number theory, sortings, two pointers		x4936
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x3708
1771C	Hossam and Trainees greedy, math, number theory	1600	x6081
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x334
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x6807
1768E	Partial Sorting combinatorics, math, number theory	2300	x1345
1768A	Greatest Convex greedy, math, number theory	800	x23072
1766D	Lucky Chains math, number theory	1600	x5706
1765M	Minimum LCM math, number theory	1000	x7454
1764B	Doremy's Perfect Math Class math, number theory	900	x12277
1763E	Node Pairs dp, graphs, math, number theory	2200	x1237
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1526
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x2470
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x12941
1762A	Divide and Conquer greedy, math, number theory	800	x16095
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x2556
1759D	Make It Round brute force, number theory	1400	x8225
1758C	Almost All Multiples greedy, number theory	1400	x9256
1753B	Factorial Divisibility math, number theory	1600	x9163
1750D	Count GCD combinatorics, math, number theory	1800	x4242
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x4219
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2186
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x3774
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x7383
1742D	Coprime brute force, greedy, number theory	1100	x15630
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x53
1740A	Factorise N+M constructive algorithms, number theory	800	x16540
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x93
1736B	Playing with GCD math, number theory	1200	x12877
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2289
1732E	Location data structures, dp, math, number theory	2800	x285
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1076
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x6226
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x11610
1731E	Graph Cost dp, greedy, math, number theory	2000	x1979
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x6901
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x452
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1363
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x259
1720A	Burenka Plays with Fractions math, number theory	900	x18701
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x76
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1202
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2301
1717E	Madoka and The Best University math, number theory	2200	x1954
1717A	Madoka and Strange Thoughts math, number theory	800	x17554
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x726
1714E	Add Modulo 10 brute force, math, number theory	1400	x11674
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x4796
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x929
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x1678
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x19883
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x90
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1384
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x5677
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x6503
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x857
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x232
1690F	Shifting String graphs, math, number theory, strings	1700	x5539
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x155
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x456
1679A	AvtoBus brute force, greedy, math, number theory	900	x17979
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x554
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x2763
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x9353
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3042
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x831
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x17234
1656H	Equal LCM Subsets data structures, math, number theory	3200	x255
1656D	K-good constructive algorithms, math, number theory	1900	x5662
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x15596
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2479
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x4486
1646E	Power Board brute force, dp, math, number theory	2200	x1909
1644F	Basis combinatorics, fft, math, number theory	2900	x263
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5065
1632D	New Year Concert binary search, data structures, greedy, math, number theory, two pointers	2000	x3798
1630F	Making It Bipartite flows, graph matchings, graphs, number theory	3400	x304
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x322
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1247
1629B	GCD Arrays greedy, math, number theory	800	x21382
1627D	Not Adding brute force, dp, math, number theory	1900	x6641
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x11950
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x530
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x434
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x683
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x18815
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x1813
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3079
1612D	X-Magic Pair math, number theory	1600	x7389
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2288
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x8453

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