Problemset - Codeforces

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Difficulty: —

number theory

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Problems

#	Name
630A	Again Twenty Five! number theory	800	x61988
472A	Design Tutorial: Learn from Math math, number theory	800	x56996
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48735
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46476
1520B	Ordinary Numbers brute force, math, number theory	800	x42820
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38340
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x38176
1899A	Game with Integers games, math, number theory	800	x37742
822A	I'm bored with life implementation, math, number theory	800	x31682
1549A	Gregor and Cryptography math, number theory	800	x31335
1553A	Digits Sum math, number theory	800	x30139
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29823
1859A	United We Stand constructive algorithms, math, number theory	800	x29260
1768A	Greatest Convex greedy, math, number theory	800	x27999
1455A	Strange Functions math, number theory	800	x26025
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25324
1525A	Potion-making math, number theory	800	x25066
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24557
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24546
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24502
1514A	Perfectly Imperfect Array math, number theory	800	x23792
1629B	GCD Arrays greedy, math, number theory	800	x22966
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21235
1605A	A.M. Deviation math, number theory	800	x20325
1740A	Factorise N+M constructive algorithms, number theory	800	x19598
1717A	Madoka and Strange Thoughts math, number theory	800	x19141
1762A	Divide and Conquer greedy, math, number theory	800	x18538
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18364
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17522
664A	Complicated GCD math, number theory	800	x17409
1810B	Candies constructive algorithms, math, number theory	800	x17134
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16959
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16928
1583A	Windblume Ode math, number theory	800	x13529
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13244
1475A	Odd Divisor math, number theory	900	x55176
313A	Ilya and Bank Account implementation, number theory	900	x53589
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29597
26A	Almost Prime number theory	900	x28538
1543A	Exciting Bets greedy, math, number theory	900	x26383
1324A	Yet Another Tetris Problem implementation, number theory	900	x25301
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25073
1471A	Strange Partition greedy, math, number theory	900	x24506
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23733
1238A	Prime Subtraction math, number theory	900	x23262
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22405
1679A	AvtoBus brute force, greedy, math, number theory	900	x21838
1720A	Burenka Plays with Fractions math, number theory	900	x21739
1828B	Permutation Swap math, number theory	900	x20615
1945B	Fireworks math, number theory	900	x19514
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16665
1764B	Doremy's Perfect Math Class math, number theory	900	x15253
84A	Toy Army math, number theory	900	x14566
267A	Subtractions math, number theory	900	x7138
122A	Lucky Division brute force, number theory	1000	x116022
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39870
577A	Multiplication Table implementation, number theory	1000	x38056
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35309
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31110
1473B	String LCM brute force, math, number theory, strings	1000	x29673
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29431
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26317
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24142
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23570
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21930
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20811
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19167
1411B	Fair Numbers brute force, number theory	1000	x17791
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16487
17A	Noldbach problem brute force, math, number theory	1000	x15066
1107B	Digital root math, number theory	1000	x14821
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14412
1245A	Good ol' Numbers Coloring math, number theory	1000	x13889
1765M	Minimum LCM math, number theory	1000	x12622
299A	Ksusha and Array brute force, number theory, sortings	1000	x7744
177B1	Rectangular Game number theory	1000	x3990
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26871
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23089
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22411
483A	Counterexample brute force, implementation, math, number theory	1100	x22205
1872C	Non-coprime Split math, number theory	1100	x21969
1511B	GCD Length constructive algorithms, math, number theory	1100	x21957
1742D	Coprime brute force, greedy, number theory	1100	x21607
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20484
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20412
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20031
1593D1	All are Same math, number theory	1100	x19564
1932B	Chaya Calendar number theory	1100	x18317
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18053
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16543
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16185
1826B	Lunatic Never Content math, number theory	1100	x15704
797A	k-Factorization implementation, math, number theory	1100	x13988
1787B	Number Factorization greedy, math, number theory	1100	x12689
633A	Ebony and Ivory brute force, math, number theory	1100	x12304
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11255
630J	Divisibility math, number theory	1100	x10681
946B	Weird Subtraction Process math, number theory	1100	x10667
758B	Blown Garland brute force, implementation, number theory	1100	x10045
898B	Proper Nutrition brute force, implementation, number theory	1100	x9264

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