Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
2 days
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Difficulty: —

number theory

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Problems

#	Name
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x678
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1396
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1318
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16775
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x603
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7904
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5836
1771C	Hossam and Trainees greedy, math, number theory	1600	x9131
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x622
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8314
1768E	Partial Sorting combinatorics, math, number theory	2300	x1795
1768A	Greatest Convex greedy, math, number theory	800	x28120
1766D	Lucky Chains math, number theory	1600	x8484
1765M	Minimum LCM math, number theory	1000	x13011
1764B	Doremy's Perfect Math Class math, number theory	900	x15333
1763E	Node Pairs dp, graphs, math, number theory	2200	x1708
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1970
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3315
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16307
1762A	Divide and Conquer greedy, math, number theory	800	x18630
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3737
1759D	Make It Round brute force, number theory	1400	x12433
1758C	Almost All Multiples greedy, number theory	1400	x13039
1753B	Factorial Divisibility math, number theory	1600	x12161
1750D	Count GCD combinatorics, math, number theory	1800	x5621
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5328
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2685
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5323
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10313
1742D	Coprime brute force, greedy, number theory	1100	x22000
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x106
1740A	Factorise N+M constructive algorithms, number theory	800	x19691
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x119
1736B	Playing with GCD math, number theory	1200	x17357
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2809
1732E	Location data structures, dp, math, number theory	2800	x415
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1371
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8330
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14499
1731E	Graph Cost dp, greedy, math, number theory	2000	x2685
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9045
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x617
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1663
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x437
1720A	Burenka Plays with Fractions math, number theory	900	x21844
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x146
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1532
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2896
1717E	Madoka and The Best University math, number theory	2200	x2505
1717A	Madoka and Strange Thoughts math, number theory	800	x19197
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1006
1714E	Add Modulo 10 brute force, math, number theory	1400	x15480
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5493
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1185
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2052
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21296
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x146
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1660
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6719
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8007
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1096
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x303
1690F	Shifting String graphs, math, number theory, strings	1700	x6869
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x219
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x582
1679A	AvtoBus brute force, greedy, math, number theory	900	x22205
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x665
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x3211
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11980
1665D	GCD Guess bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory	2000	x3730
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1024
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18405
1656H	Equal LCM Subsets data structures, math, number theory	3200	x419
1656D	K-good constructive algorithms, math, number theory	1900	x6665
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18627
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2791
1647D	Madoka and the Best School in Russia constructive algorithms, dp, math, number theory	1900	x5139
1646E	Power Board brute force, dp, math, number theory	2200	x2309
1644F	Basis combinatorics, fft, math, number theory	2900	x316
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6036
1632D	New Year Concert binary search, data structures, greedy, math, number theory, two pointers	2000	x4497
1630F	Making It Bipartite flows, graph matchings, graphs, number theory	3400	x521
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x425
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1516
1629B	GCD Arrays greedy, math, number theory	800	x23032
1627D	Not Adding brute force, dp, math, number theory	1900	x7888
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14107
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x714
1622F	Quadratic Set constructive algorithms, hashing, math, number theory	2900	x598
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x838
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22555
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2196
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3671
1612D	X-Magic Pair math, number theory	1600	x8872
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2600
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9532
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16728
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1355
1606C	Banknotes greedy, number theory	1400	x13811
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1000