Problemset - Codeforces

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number theory

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Problems

#	Name
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16537
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x597
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7792
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5752
1771C	Hossam and Trainees greedy, math, number theory	1600	x8990
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x611
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8258
1768E	Partial Sorting combinatorics, math, number theory	2300	x1781
1768A	Greatest Convex greedy, math, number theory	800	x27992
1766D	Lucky Chains math, number theory	1600	x8353
1765M	Minimum LCM math, number theory	1000	x12611
1764B	Doremy's Perfect Math Class math, number theory	900	x15249
1763E	Node Pairs dp, graphs, math, number theory	2200	x1695
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1956
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3286
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16185
1762A	Divide and Conquer greedy, math, number theory	800	x18535
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3694
1759D	Make It Round brute force, number theory	1400	x12162
1758C	Almost All Multiples greedy, number theory	1400	x12890
1753B	Factorial Divisibility math, number theory	1600	x12027
1750D	Count GCD combinatorics, math, number theory	1800	x5555
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5259
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2661
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5265
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10208
1742D	Coprime brute force, greedy, number theory	1100	x21589
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	x19592
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x117
1736B	Playing with GCD math, number theory	1200	x17249
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2761
1732E	Location data structures, dp, math, number theory	2800	x413
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1363
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8251
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14409
1731E	Graph Cost dp, greedy, math, number theory	2000	x2657
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8928
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x615
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1649
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x432
1720A	Burenka Plays with Fractions math, number theory	900	x21730
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	x1514
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2875
1717E	Madoka and The Best University math, number theory	2200	x2471
1717A	Madoka and Strange Thoughts math, number theory	800	x19134
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1000
1714E	Add Modulo 10 brute force, math, number theory	1400	x15240
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5441
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1182
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2039
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21234
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	x1653
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6665
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x7930
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1082
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x300
1690F	Shifting String graphs, math, number theory, strings	1700	x6799
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x213
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x577
1679A	AvtoBus brute force, greedy, math, number theory	900	x21826
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x659
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x3192
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11683
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3687
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1019
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18360
1656H	Equal LCM Subsets data structures, math, number theory	3200	x409
1656D	K-good constructive algorithms, math, number theory	1900	x6595
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18478
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2776
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5110
1646E	Power Board brute force, dp, math, number theory	2200	x2297
1644F	Basis combinatorics, fft, math, number theory	2900	x312
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5995
1632D	New Year Concert binary search, data structures, greedy, math, number theory, two pointers	2000	x4461
1630F	Making It Bipartite flows, graph matchings, graphs, number theory	3400	x506
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x423
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1508
1629B	GCD Arrays greedy, math, number theory	800	x22964
1627D	Not Adding brute force, dp, math, number theory	1900	x7827
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14032
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x704
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x591
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x832
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22399
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2175
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3650
1612D	X-Magic Pair math, number theory	1600	x8826
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2577
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9477
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16664
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1347
1606C	Banknotes greedy, number theory	1400	x13736
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x997
1605A	A.M. Deviation math, number theory	800	x20322
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x609
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1974