Problemset - Codeforces

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Difficulty: —

number theory

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Problems

#	Name
630A	Again Twenty Five! number theory	800	x62107
472A	Design Tutorial: Learn from Math math, number theory	800	x57060
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48836
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46581
1520B	Ordinary Numbers brute force, math, number theory	800	x42875
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38415
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x38221
1899A	Game with Integers games, math, number theory	800	x37994
822A	I'm bored with life implementation, math, number theory	800	x31711
1549A	Gregor and Cryptography math, number theory	800	x31356
1553A	Digits Sum math, number theory	800	x30161
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29932
1859A	United We Stand constructive algorithms, math, number theory	800	x29369
1768A	Greatest Convex greedy, math, number theory	800	x28020
1455A	Strange Functions math, number theory	800	x26042
1968A	Maximize? brute force, math, number theory	800	x25625
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25330
1525A	Potion-making math, number theory	800	x25070
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24611
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24552
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24549
1514A	Perfectly Imperfect Array math, number theory	800	x23799
1629B	GCD Arrays greedy, math, number theory	800	x22975
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21250
1605A	A.M. Deviation math, number theory	800	x20333
1740A	Factorise N+M constructive algorithms, number theory	800	x19612
1717A	Madoka and Strange Thoughts math, number theory	800	x19152
1762A	Divide and Conquer greedy, math, number theory	800	x18560
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18368
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17532
664A	Complicated GCD math, number theory	800	x17428
1810B	Candies constructive algorithms, math, number theory	800	x17139
1789A	Serval and Mocha's Array brute force, math, number theory	800	x17016
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16934
1583A	Windblume Ode math, number theory	800	x13532
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13249
1475A	Odd Divisor math, number theory	900	x55322
313A	Ilya and Bank Account implementation, number theory	900	x53650
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29624
26A	Almost Prime number theory	900	x28610
1543A	Exciting Bets greedy, math, number theory	900	x26422
1324A	Yet Another Tetris Problem implementation, number theory	900	x25308
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25123
1471A	Strange Partition greedy, math, number theory	900	x24544
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23813
1238A	Prime Subtraction math, number theory	900	x23279
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22423
1679A	AvtoBus brute force, greedy, math, number theory	900	x21897
1720A	Burenka Plays with Fractions math, number theory	900	x21762
1828B	Permutation Swap math, number theory	900	x20666
1945B	Fireworks math, number theory	900	x19663
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16677
1764B	Doremy's Perfect Math Class math, number theory	900	x15268
84A	Toy Army math, number theory	900	x14575
267A	Subtractions math, number theory	900	x7142
122A	Lucky Division brute force, number theory	1000	x116281
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39930
577A	Multiplication Table implementation, number theory	1000	x38100
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35348
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31156
1473B	String LCM brute force, math, number theory, strings	1000	x29713
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29466
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26370
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24160
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23626
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21954
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20834
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19177
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x18124
1411B	Fair Numbers brute force, number theory	1000	x17823
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16524
17A	Noldbach problem brute force, math, number theory	1000	x15096
1107B	Digital root math, number theory	1000	x14833
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14422
1245A	Good ol' Numbers Coloring math, number theory	1000	x13890
1765M	Minimum LCM math, number theory	1000	x12672
299A	Ksusha and Array brute force, number theory, sortings	1000	x7752
177B1	Rectangular Game number theory	1000	x3991
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26902
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23102
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22434
483A	Counterexample brute force, implementation, math, number theory	1100	x22227
1872C	Non-coprime Split math, number theory	1100	x22006
1511B	GCD Length constructive algorithms, math, number theory	1100	x21972
1742D	Coprime brute force, greedy, number theory	1100	x21705
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20517
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20491
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20311
1593D1	All are Same math, number theory	1100	x19574
1932B	Chaya Calendar number theory	1100	x18388
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18111
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16570
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16196
1826B	Lunatic Never Content math, number theory	1100	x15753
797A	k-Factorization implementation, math, number theory	1100	x14009
1787B	Number Factorization greedy, math, number theory	1100	x12703
633A	Ebony and Ivory brute force, math, number theory	1100	x12316
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11257
630J	Divisibility math, number theory	1100	x10686
946B	Weird Subtraction Process math, number theory	1100	x10671

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