Problemset - Codeforces

Please subscribe to the official Codeforces channel in Telegram via the link https://t.me/codeforces_official. ×

→ Pay attention

Before contest
Codeforces Round (Div. 2)
46:15:12
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1741F	Multi-Colored Segments binary search, data structures, math, sortings	2000	x2307
1741C	Minimize the Thickness brute force, greedy, math, two pointers	1100	x17490
1741B	Funny Permutation constructive algorithms, math	800	x25121
1740F	Conditional Mix combinatorics, dp, math	2600	x777
1739B	Array Recovery constructive algorithms, greedy, math	1100	x21986
1738G	Anti-Increasing Addicts constructive algorithms, dp, greedy, math	2900	x418
1738E	Balance Addicts combinatorics, dp, math, two pointers	2300	x1495
1738C	Even Number Addicts dp, games, greedy, math	1500	x10930
1738B	Prefix Sum Addicts constructive algorithms, greedy, math, sortings	1200	x15243
1737F	Ela and Prime GCD constructive algorithms, math, number theory	3300	x122
1737E	Ela Goes Hiking combinatorics, dp, math, probabilities	2500	x910
1737C	Ela and Crickets constructive algorithms, games, implementation, math	1500	x5657
1737B	Ela's Fitness and the Luxury Number binary search, implementation, math	1300	x9295
1736B	Playing with GCD math, number theory	1200	x17621
1735D	Meta-set brute force, combinatorics, data structures, hashing, math	1700	x5404
1735B	Tea with Tangerines greedy, math	900	x17962
1735A	Working Week constructive algorithms, greedy, math	800	x20060
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x779
1734C	Removing Smallest Multiples greedy, math	1200	x17749
1733E	Conveyor constructive algorithms, dp, math	2700	x1118
1733D1	Zero-One (Easy Version) constructive algorithms, greedy, math	1400	x13176
1733B	Rule of League constructive algorithms, math	900	x19490
1732E	Location data structures, dp, math, number theory	2800	x420
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14704
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x676
1731E	Graph Cost dp, greedy, math, number theory	2000	x2738
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9261
1731B	Kill Demodogs greedy, math	1100	x17565
1731A	Joey Takes Money greedy, math	800	x22332
1730C	Minimum Notation data structures, greedy, math, sortings	1200	x16283
1730B	Meeting on the Line binary search, geometry, greedy, implementation, math, ternary search	1600	x12304
1729F	Kirei and the Linear Function hashing, math	1900	x4084
1729A	Two Elevators math	800	x39683
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x440
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1689
1726H	Mainak and the Bleeding Polygon binary search, geometry, implementation, math	3500	x82
1726E	Almost Perfect combinatorics, fft, math	2400	x1376
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x14914
1726A	Mainak and Array greedy, math	900	x20798
1725H	Hot Black Hot White constructive algorithms, math	1800	x2548
1725G	Garage binary search, geometry, math	1500	x5740
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x452
1725D	Deducing Sortability binary search, bitmasks, math	2900	x119
1725C	Circular Mirror binary search, combinatorics, geometry, math, two pointers	2000	x1582
1725A	Accumulation of Dominoes math	800	x9163
1720E	Misha and Paintings constructive algorithms, data structures, greedy, implementation, math	2700	x752
1720B	Interesting Sum brute force, data structures, greedy, math, sortings	800	x20930
1720A	Burenka Plays with Fractions math, number theory	900	x22057
1719B	Mathematical Circus constructive algorithms, math	800	x18396
1719A	Chip Game games, math	800	x25183
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x152
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x105
1718D	Permutation for Burenka data structures, graph matchings, greedy, math, trees	3300	x298
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1552
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2935
1717E	Madoka and The Best University math, number theory	2200	x2610
1717D	Madoka and The Corruption Scheme combinatorics, constructive algorithms, greedy, math	1900	x4330
1717A	Madoka and Strange Thoughts math, number theory	800	x19303
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1018
1716D	Chip Move brute force, dp, math	2000	x5106
1716B	Permutation Chain constructive algorithms, math	800	x21312
1716A	2-3 Moves greedy, math	800	x32342
1715F	Crop Squares constructive algorithms, geometry, interactive, math	2700	x511
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8494
1715B	Beautiful Array constructive algorithms, greedy, math	1000	x20932
1715A	Crossmarket constructive algorithms, greedy, math	800	x23352
1714E	Add Modulo 10 brute force, math, number theory	1400	x15941
1714A	Everyone Loves to Sleep implementation, math	900	x29147
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x522
1713C	Build Permutation constructive algorithms, dp, math	1200	x17068
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1235
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2099
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1305
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2407
1710A	Color the Picture constructive algorithms, greedy, math	1500	x10750
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x539
1709D	Rorororobot binary search, data structures, greedy, math	1700	x8246
1709A	Three Doors brute force, greedy, implementation, math	800	x29328
1708B	Difference of GCDs constructive algorithms, math	1100	x20119
1708A	Difference Operations greedy, math	800	x21592
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x598
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1674
1706B	Making Towers dp, greedy, math	1100	x16348
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6219
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x79
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x177
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x99
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2257
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x4952
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10357
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8182
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x907
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5587
1700D	River Locks binary search, dp, greedy, math	1900	x5954
1700B	Palindromic Numbers constructive algorithms, implementation, math	1100	x18533
1700A	Optimal Path constructive algorithms, greedy, math	800	x22720
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1116
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9593
1699A	The Third Three Number Problem constructive algorithms, math	800	x23809
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x308