Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
05:06:27
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
05:06:26
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1510
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1575
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1643
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1646
1768E	Partial Sorting combinatorics, math, number theory	2300	x1768
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1971
1139D	Steps to One dp, math, number theory, probabilities	2300	x1975
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2017
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2037
623B	Array GCD dp, greedy, number theory	2300	x2039
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2043
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2111
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2156
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2172
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2292
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2506
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2521
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2640
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2701
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3213
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x4207
271E	Three Horses constructive algorithms, math, number theory	2200	x478
852F	Product transformation combinatorics, math, number theory	2200	x542
1575G	GCD Festival math, number theory	2200	x639
45G	Prime Problem number theory	2200	x993
337E	Divisor Tree brute force, number theory, trees	2200	x1003
113C	Double Happiness brute force, math, number theory	2200	x1201
691F	Couple Cover brute force, dp, number theory	2200	x1244
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1444
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1580
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1671
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1681
1763E	Node Pairs dp, graphs, math, number theory	2200	x1686
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1792
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1952
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1983
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2021
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2212
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2259
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2290
1646E	Power Board brute force, dp, math, number theory	2200	x2292
1717E	Madoka and The Best University math, number theory	2200	x2459
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2558
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2589
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2200	x2613
616E	Sum of Remainders implementation, math, number theory	2200	x2656
839D	Winter is here combinatorics, dp, math, number theory	2200	x2682
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2771
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3023
1389E	Calendar Ambiguity math, number theory	2200	x3106
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3906
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4929
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6129
306C	White, Black and White Again combinatorics, number theory	2100	x435
215E	Periodical Numbers combinatorics, dp, number theory	2100	x538
225E	Unsolvable math, number theory	2100	x777
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x928
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x931
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x947
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1060
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1384
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1722
1510D	Digits dp, math, number theory	2100	x1794
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1819
850B	Arpa and a list of numbers implementation, number theory	2100	x1973
348B	Apple Tree dfs and similar, number theory, trees	2100	x2039
776E	The Holmes Children math, number theory	2100	x2098
980D	Perfect Groups dp, math, number theory	2100	x2406
955C	Sad powers binary search, math, number theory	2100	x2454
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2654
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2702
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2749
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2774
1884D	Counting Rhyme dp, math, number theory	2100	x2782
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x2929
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2968
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3137
498C	Array and Operations flows, graph matchings, number theory	2100	x3272
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3276
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3294
632D	Longest Subsequence brute force, math, number theory	2100	x3363
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3647
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4081
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4732
1499D	The Number of Pairs dp, math, number theory	2100	x5441
474F	Ant colony data structures, math, number theory	2100	x7645
216E	Martian Luck math, number theory	2000	x543
251C	Number Transformation dp, greedy, number theory	2000	x1011
10C	Digital Root number theory	2000	x1390
78C	Beaver Game dp, games, number theory	2000	x1798
1033D	Divisors interactive, math, number theory	2000	x2302
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2410
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2467
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2574
1731E	Graph Cost dp, greedy, math, number theory	2000	x2644
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2871
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2969
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2982
1210C	Kamil and Making a Stream math, number theory, trees	2000	x3201
893E	Counting Arrays combinatorics, dp, math, number theory	2000	x3255