Problemset - Codeforces

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Before contest
Codeforces Round 941 (Div. 1)
4 days

Before contest
Codeforces Round 941 (Div. 2)
4 days

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Difficulty: —

number theory

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Problems

#	Name
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x596
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8240
1768E	Partial Sorting combinatorics, math, number theory	2300	x1765
1768A	Greatest Convex greedy, math, number theory	800	x27873
1766D	Lucky Chains math, number theory	1600	x8301
1765M	Minimum LCM math, number theory	1000	x12474
1764B	Doremy's Perfect Math Class math, number theory	900	x15209
1763E	Node Pairs dp, graphs, math, number theory	2200	x1683
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1949
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3269
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16146
1762A	Divide and Conquer greedy, math, number theory	800	x18493
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3671
1759D	Make It Round brute force, number theory	1400	x11981
1758C	Almost All Multiples greedy, number theory	1400	x12847
1753B	Factorial Divisibility math, number theory	1600	x11973
1750D	Count GCD combinatorics, math, number theory	1800	x5519
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5230
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2651
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5234
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10156
1742D	Coprime brute force, greedy, number theory	1100	x21409
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x104
1740A	Factorise N+M constructive algorithms, number theory	800	x19552
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x117
1736B	Playing with GCD math, number theory	1200	x17191
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2747
1732E	Location data structures, dp, math, number theory	2800	x404
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1357
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8214
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14369
1731E	Graph Cost dp, greedy, math, number theory	2000	x2641
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8880
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x609
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1644
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x432
1720A	Burenka Plays with Fractions math, number theory	900	x21668
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x145
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1508
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2865
1717E	Madoka and The Best University math, number theory	2200	x2453
1717A	Madoka and Strange Thoughts math, number theory	800	x19093
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x990
1714E	Add Modulo 10 brute force, math, number theory	1400	x15146
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5420
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1177
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2033
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21205
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x144
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1648
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6642
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x7896
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1073
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x300
1690F	Shifting String graphs, math, number theory, strings	1700	x6762
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x211
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x576
1679A	AvtoBus brute force, greedy, math, number theory	900	x21688
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x658
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x3183
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11624
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3672
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1001
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18337
1656H	Equal LCM Subsets data structures, math, number theory	3200	x395
1656D	K-good constructive algorithms, math, number theory	1900	x6568
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18426
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2772
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5092
1646E	Power Board brute force, dp, math, number theory	2200	x2289
1644F	Basis combinatorics, fft, math, number theory	2900	x310
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5977
1632D	New Year Concert binary search, data structures, greedy, math, number theory, two pointers	2000	x4449
1630F	Making It Bipartite flows, graph matchings, graphs, number theory	3400	x489
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x419
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1504
1629B	GCD Arrays greedy, math, number theory	800	x22931
1627D	Not Adding brute force, dp, math, number theory	1900	x7795
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x13996
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x700
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x583
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x827
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22321
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2169
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3641
1612D	X-Magic Pair math, number theory	1600	x8803
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2574
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9459
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16631
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1345
1606C	Banknotes greedy, number theory	1400	x13703
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x995
1605A	A.M. Deviation math, number theory	800	x20307
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x609
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1969
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13038
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16076
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13096
1593D2	Half of Same brute force, math, number theory	1900	x4779
1593D1	All are Same math, number theory	1100	x19523