Problemset - Codeforces

→ Pay attention

Contest is running
2023 Post World Finals Online ICPC Challenge powered by Huawei
12 days
Register now »

Contest is running
Kotlin Heroes: Practice 10
5 days
Register now »

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1427
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1538
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1593
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1649
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1654
1768E	Partial Sorting combinatorics, math, number theory	2300	x1781
1603C	Extreme Extension dp, greedy, math, number theory	2300	x1974
1139D	Steps to One dp, math, number theory, probabilities	2300	x1983
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2024
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2039
623B	Array GCD dp, greedy, number theory	2300	x2042
1834E	MEX of LCM binary search, data structures, implementation, math, number theory	2300	x2060
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2140
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2157
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2176
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2295
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2509
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2524
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2646
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2703
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3240
1188B	Count Pairs math, matrices, number theory, two pointers	2300	x4221
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	x641
45G	Prime Problem number theory	2200	x994
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	x1246
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	x1674
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1684
1763E	Node Pairs dp, graphs, math, number theory	2200	x1697
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1734
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1808
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1956
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1984
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2069
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2214
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x2260
1646E	Power Board brute force, dp, math, number theory	2200	x2298
1822G2	Magic Triples (Hard Version) brute force, data structures, math, number theory	2200	x2301
1717E	Madoka and The Best University math, number theory	2200	x2474
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x2560
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2600
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2200	x2619
616E	Sum of Remainders implementation, math, number theory	2200	x2678
839D	Winter is here combinatorics, dp, math, number theory	2200	x2686
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2771
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3061
1389E	Calendar Ambiguity math, number theory	2200	x3109
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x3942
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4938
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6144
306C	White, Black and White Again combinatorics, number theory	2100	x437
215E	Periodical Numbers combinatorics, dp, number theory	2100	x538
225E	Unsolvable math, number theory	2100	x777
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x932
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x934
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x949
1146D	Frog Jumping dfs and similar, math, number theory	2100	x1078
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	x1723
1510D	Digits dp, math, number theory	2100	x1798
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1825
850B	Arpa and a list of numbers implementation, number theory	2100	x1975
348B	Apple Tree dfs and similar, number theory, trees	2100	x2042
776E	The Holmes Children math, number theory	2100	x2101
980D	Perfect Groups dp, math, number theory	2100	x2412
955C	Sad powers binary search, math, number theory	2100	x2461
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2663
1734E	Rectangular Congruence constructive algorithms, number theory	2100	x2761
1654D	Potion Brewing Class dfs and similar, math, number theory, trees	2100	x2779
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2782
1884D	Counting Rhyme dp, math, number theory	2100	x2804
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x2933
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x2976
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3140
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3287
1025D	Recovering BST brute force, dp, math, number theory, trees	2100	x3297
498C	Array and Operations flows, graph matchings, number theory	2100	x3297
632D	Longest Subsequence brute force, math, number theory	2100	x3382
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3650
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4092
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4738
1499D	The Number of Pairs dp, math, number theory	2100	x5460
474F	Ant colony data structures, math, number theory	2100	x7696
216E	Martian Luck math, number theory	2000	x543
251C	Number Transformation dp, greedy, number theory	2000	x1011
10C	Digital Root number theory	2000	x1391
78C	Beaver Game dp, games, number theory	2000	x1801
1033D	Divisors interactive, math, number theory	2000	x2304
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2436
1029F	Multicolored Markers binary search, brute force, math, number theory	2000	x2472
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2577
1731E	Graph Cost dp, greedy, math, number theory	2000	x2661
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2879
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2983
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2990
1210C	Kamil and Making a Stream math, number theory, trees	2000	x3204