Problemset - Codeforces

→ Pay attention

Contest is running
Codeforces Round 942 (Div. 1)
02:29:19

*has extra registration

Contest is running
Codeforces Round 942 (Div. 2)
02:29:20

*has extra registration

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17017
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17030
1810B	Candies constructive algorithms, math, number theory	800	x17122
1736B	Playing with GCD math, number theory	1200	x17224
664A	Complicated GCD math, number theory	800	x17378
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17503
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17555
1411B	Fair Numbers brute force, number theory	1000	x17736
762A	k-th divisor math, number theory	1400	x17901
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17965
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18109
1932B	Chaya Calendar number theory	1100	x18198
1538F	Interesting Function binary search, dp, math, number theory	1500	x18300
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18349
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18455
1762A	Divide and Conquer greedy, math, number theory	800	x18519
1717A	Madoka and Strange Thoughts math, number theory	800	x19113
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19156
1945B	Fireworks math, number theory	900	x19226
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19248
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19319
1593D1	All are Same math, number theory	1100	x19547
1740A	Factorise N+M constructive algorithms, number theory	800	x19578
1487B	Cat Cycle math, number theory	1200	x19598
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x19655
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19701
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20267
1605A	A.M. Deviation math, number theory	800	x20317
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20429
1350B	Orac and Models dp, math, number theory	1400	x20536
1828B	Permutation Swap math, number theory	900	x20544
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20724
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20766
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20776
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21218
1742D	Coprime brute force, greedy, number theory	1100	x21504
1720A	Burenka Plays with Fractions math, number theory	900	x21705
1679A	AvtoBus brute force, greedy, math, number theory	900	x21765
1872C	Non-coprime Split math, number theory	1100	x21861
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21882
1285C	Fadi and LCM brute force, math, number theory	1400	x21909
1511B	GCD Length constructive algorithms, math, number theory	1100	x21938
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x22006
483A	Counterexample brute force, implementation, math, number theory	1100	x22153
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22362
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22366
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22718
1629B	GCD Arrays greedy, math, number theory	800	x22949
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23064
1238A	Prime Subtraction math, number theory	900	x23245
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23402
1370C	Number Game games, math, number theory	1400	x23500
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23503
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23630
1514A	Perfectly Imperfect Array math, number theory	800	x23774
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24096
1471A	Strange Partition greedy, math, number theory	900	x24436
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24456
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24458
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24535
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25019
1525A	Potion-making math, number theory	800	x25049
1324A	Yet Another Tetris Problem implementation, number theory	900	x25275
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25307
1455A	Strange Functions math, number theory	800	x25986
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26092
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26253
1543A	Exciting Bets greedy, math, number theory	900	x26310
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26401
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26753
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26812
1768A	Greatest Convex greedy, math, number theory	800	x27943
26A	Almost Prime number theory	900	x28452
1526B	I Hate 1111 dp, math, number theory	1400	x28591
1859A	United We Stand constructive algorithms, math, number theory	800	x29134
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29363
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29541
1473B	String LCM brute force, math, number theory, strings	1000	x29620
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29634
1553A	Digits Sum math, number theory	800	x30087
1360D	Buying Shovels math, number theory	1300	x30708
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31033
1549A	Gregor and Cryptography math, number theory	800	x31276
822A	I'm bored with life implementation, math, number theory	800	x31626
1294C	Product of Three Numbers greedy, math, number theory	1300	x32209
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35263
1899A	Game with Integers games, math, number theory	800	x37422
577A	Multiplication Table implementation, number theory	1000	x37984
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x38066
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38259
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39760
1520B	Ordinary Numbers brute force, math, number theory	800	x42716
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46348
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48601
313A	Ilya and Bank Account implementation, number theory	900	x53468
1475A	Odd Divisor math, number theory	900	x54936
472A	Design Tutorial: Learn from Math math, number theory	800	x56885
630A	Again Twenty Five! number theory	800	x61770
230B	T-primes binary search, implementation, math, number theory	1300	x69677
122A	Lucky Division brute force, number theory	1000	x115721

→