Problemset - Codeforces

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number theory

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Problems

#	Name
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1429
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1560
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1595
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1655
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1668
1768E	Partial Sorting combinatorics, math, number theory	2300	x1789
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1981
1139D	Steps to One dp, math, number theory, probabilities	2300	x1994
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2035
623B	Array GCD dp, greedy, number theory	2300	x2046
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2047
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2075
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2148
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2167
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2187
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2299
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2516
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2532
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2651
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2710
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3261
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x4309
271E	Three Horses constructive algorithms, math, number theory	2200	x478
852F	Product transformation combinatorics, math, number theory	2200	x560
1575G	GCD Festival math, number theory	2200	x642
45G	Prime Problem number theory	2200	x995
337E	Divisor Tree brute force, number theory, trees	2200	x1005
113C	Double Happiness brute force, math, number theory	2200	x1202
691F	Couple Cover brute force, dp, number theory	2200	x1248
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1446
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1683
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1692
1763E	Node Pairs dp, graphs, math, number theory	2200	x1702
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1810
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1830
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1965
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1988
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2131
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2218
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2263
1646E	Power Board brute force, dp, math, number theory	2200	x2303
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2319
1717E	Madoka and The Best University math, number theory	2200	x2493
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2563
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2200	x2626
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2634
839D	Winter is here combinatorics, dp, math, number theory	2200	x2695
616E	Sum of Remainders implementation, math, number theory	2200	x2710
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2776
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3074
1389E	Calendar Ambiguity math, number theory	2200	x3115
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3152
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3979
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4947
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6164
306C	White, Black and White Again combinatorics, number theory	2100	x441
215E	Periodical Numbers combinatorics, dp, number theory	2100	x538
225E	Unsolvable math, number theory	2100	x781
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x934
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x938
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x949
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1081
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1386
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1724
1510D	Digits dp, math, number theory	2100	x1803
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1838
850B	Arpa and a list of numbers implementation, number theory	2100	x1977
348B	Apple Tree dfs and similar, number theory, trees	2100	x2046
776E	The Holmes Children math, number theory	2100	x2103
980D	Perfect Groups dp, math, number theory	2100	x2416
955C	Sad powers binary search, math, number theory	2100	x2465
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2670
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2771
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2786
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2789
1884D	Counting Rhyme dp, math, number theory	2100	x2866
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x2939
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2983
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3144
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3300
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3300
498C	Array and Operations flows, graph matchings, number theory	2100	x3310
632D	Longest Subsequence brute force, math, number theory	2100	x3398
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3659
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4105
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4755
1499D	The Number of Pairs dp, math, number theory	2100	x5491
474F	Ant colony data structures, math, number theory	2100	x7761
216E	Martian Luck math, number theory	2000	x543
251C	Number Transformation dp, greedy, number theory	2000	x1012
10C	Digital Root number theory	2000	x1396
78C	Beaver Game dp, games, number theory	2000	x1806
1033D	Divisors interactive, math, number theory	2000	x2311
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2471
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2477
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2589
1731E	Graph Cost dp, greedy, math, number theory	2000	x2675
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2889
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3003
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3008