Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 3)
4 days

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1735D	Meta-set brute force, combinatorics, data structures, hashing, math	1700	x5384
1735B	Tea with Tangerines greedy, math	900	x17910
1735A	Working Week constructive algorithms, greedy, math	800	x20031
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x778
1734C	Removing Smallest Multiples greedy, math	1200	x17589
1733E	Conveyor constructive algorithms, dp, math	2700	x1113
1733D1	Zero-One (Easy Version) constructive algorithms, greedy, math	1400	x13129
1733B	Rule of League constructive algorithms, math	900	x19452
1732E	Location data structures, dp, math, number theory	2800	x420
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14651
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x671
1731E	Graph Cost dp, greedy, math, number theory	2000	x2726
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x9203
1731B	Kill Demodogs greedy, math	1100	x17424
1731A	Joey Takes Money greedy, math	800	x22259
1730C	Minimum Notation data structures, greedy, math, sortings	1200	x16255
1730B	Meeting on the Line binary search, geometry, greedy, implementation, math, ternary search	1600	x12221
1729F	Kirei and the Linear Function hashing, math	1900	x4069
1729A	Two Elevators math	800	x39559
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x437
1728E	Red-Black Pepper brute force, data structures, greedy, math, number theory	2300	x1681
1726H	Mainak and the Bleeding Polygon binary search, geometry, implementation, math	3500	x82
1726E	Almost Perfect combinatorics, fft, math	2400	x1370
1726B	Mainak and Interesting Sequence bitmasks, constructive algorithms, math	1100	x14879
1726A	Mainak and Array greedy, math	900	x20644
1725H	Hot Black Hot White constructive algorithms, math	1800	x2543
1725G	Garage binary search, geometry, math	1500	x5725
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x449
1725D	Deducing Sortability binary search, bitmasks, math	2900	x119
1725C	Circular Mirror binary search, combinatorics, geometry, math, two pointers	2000	x1574
1725A	Accumulation of Dominoes math	800	x9149
1720E	Misha and Paintings constructive algorithms, data structures, greedy, implementation, math	2700	x751
1720B	Interesting Sum brute force, data structures, greedy, math, sortings	800	x20895
1720A	Burenka Plays with Fractions math, number theory	900	x22017
1719B	Mathematical Circus constructive algorithms, math	800	x18378
1719A	Chip Game games, math	800	x25149
1718F	Burenka, an Array and Queries data structures, math, number theory	3300	x147
1718E	Impressionism constructive algorithms, graphs, implementation, math	3500	x105
1718D	Permutation for Burenka data structures, graph matchings, greedy, math, trees	3300	x294
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1544
1718B	Fibonacci Strings greedy, implementation, math, number theory	2000	x2922
1717E	Madoka and The Best University math, number theory	2200	x2549
1717D	Madoka and The Corruption Scheme combinatorics, constructive algorithms, greedy, math	1900	x4317
1717A	Madoka and Strange Thoughts math, number theory	800	x19274
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1013
1716D	Chip Move brute force, dp, math	2000	x5073
1716B	Permutation Chain constructive algorithms, math	800	x21295
1716A	2-3 Moves greedy, math	800	x32225
1715F	Crop Squares constructive algorithms, geometry, interactive, math	2700	x510
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8468
1715B	Beautiful Array constructive algorithms, greedy, math	1000	x20795
1715A	Crossmarket constructive algorithms, greedy, math	800	x23322
1714E	Add Modulo 10 brute force, math, number theory	1400	x15831
1714A	Everyone Loves to Sleep implementation, math	900	x29061
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x520
1713C	Build Permutation constructive algorithms, dp, math	1200	x17009
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1225
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2087
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1298
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2394
1710A	Color the Picture constructive algorithms, greedy, math	1500	x10732
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x538
1709D	Rorororobot binary search, data structures, greedy, math	1700	x8216
1709A	Three Doors brute force, greedy, implementation, math	800	x29274
1708B	Difference of GCDs constructive algorithms, math	1100	x19996
1708A	Difference Operations greedy, math	800	x21579
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x592
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1664
1706B	Making Towers dp, greedy, math	1100	x16314
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6201
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x79
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x176
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x99
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2250
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x4925
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10301
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8130
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x905
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5573
1700D	River Locks binary search, dp, greedy, math	1900	x5932
1700B	Palindromic Numbers constructive algorithms, implementation, math	1100	x18450
1700A	Optimal Path constructive algorithms, greedy, math	800	x22681
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1110
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9537
1699A	The Third Three Number Problem constructive algorithms, math	800	x23772
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x308
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x598
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1152
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x156
1696G	Fishingprince Plays With Array Again brute force, data structures, geometry, math	3300	x269
1696E	Placing Jinas combinatorics, math	2000	x3936
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11406
1692H	Gambling data structures, dp, greedy, math	1700	x7227
1692F	3SUM brute force, math	1300	x21944
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x932
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15297
1691A	Beat The Odds brute force, greedy, math	800	x30137
1690F	Shifting String graphs, math, number theory, strings	1700	x6946
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x14800
1687F	Koishi's Unconscious Permutation fft, math	3500	x80