Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
32:53:35
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
32:53:35
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
122A	Lucky Division brute force, number theory	1000	x115562
230B	T-primes binary search, implementation, math, number theory	1300	x69586
630A	Again Twenty Five! number theory	800	x61610
472A	Design Tutorial: Learn from Math math, number theory	800	x56822
1475A	Odd Divisor math, number theory	900	x54832
313A	Ilya and Bank Account implementation, number theory	900	x53398
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48552
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46293
1520B	Ordinary Numbers brute force, math, number theory	800	x42679
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39709
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38218
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x37994
577A	Multiplication Table implementation, number theory	1000	x37947
1899A	Game with Integers games, math, number theory	800	x37234
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35221
1294C	Product of Three Numbers greedy, math, number theory	1300	x32152
822A	I'm bored with life implementation, math, number theory	800	x31606
1549A	Gregor and Cryptography math, number theory	800	x31253
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x30988
1360D	Buying Shovels math, number theory	1300	x30636
1553A	Digits Sum math, number theory	800	x30054
1473B	String LCM brute force, math, number theory, strings	1000	x29589
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29543
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29517
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29332
1859A	United We Stand constructive algorithms, math, number theory	800	x29058
1526B	I Hate 1111 dp, math, number theory	1400	x28544
26A	Almost Prime number theory	900	x28408
1768A	Greatest Convex greedy, math, number theory	800	x27911
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26728
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26702
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26372
1543A	Exciting Bets greedy, math, number theory	900	x26276
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26221
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26052
1455A	Strange Functions math, number theory	800	x25982
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25269
1324A	Yet Another Tetris Problem implementation, number theory	900	x25226
1525A	Potion-making math, number theory	800	x25039
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x24996
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24525
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24432
1471A	Strange Partition greedy, math, number theory	900	x24408
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24403
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24080
1514A	Perfectly Imperfect Array math, number theory	800	x23766
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23568
1370C	Number Game games, math, number theory	1400	x23478
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23458
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23390
1238A	Prime Subtraction math, number theory	900	x23218
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23048
1629B	GCD Arrays greedy, math, number theory	800	x22943
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22707
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22345
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22325
483A	Counterexample brute force, implementation, math, number theory	1100	x22124
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x21983
1511B	GCD Length constructive algorithms, math, number theory	1100	x21922
1285C	Fadi and LCM brute force, math, number theory	1400	x21888
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21852
1872C	Non-coprime Split math, number theory	1100	x21838
1679A	AvtoBus brute force, greedy, math, number theory	900	x21723
1720A	Burenka Plays with Fractions math, number theory	900	x21690
1742D	Coprime brute force, greedy, number theory	1100	x21452
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21208
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20734
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20717
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20710
1350B	Orac and Models dp, math, number theory	1400	x20512
1828B	Permutation Swap math, number theory	900	x20500
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20405
1605A	A.M. Deviation math, number theory	800	x20313
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20192
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19683
1487B	Cat Cycle math, number theory	1200	x19573
1740A	Factorise N+M constructive algorithms, number theory	800	x19561
1593D1	All are Same math, number theory	1100	x19536
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x19392
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19314
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19231
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19150
1717A	Madoka and Strange Thoughts math, number theory	800	x19101
1945B	Fireworks math, number theory	900	x19068
1762A	Divide and Conquer greedy, math, number theory	800	x18501
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18439
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18345
1538F	Interesting Function binary search, dp, math, number theory	1500	x18277
1932B	Chaya Calendar number theory	1100	x18118
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18064
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17917
762A	k-th divisor math, number theory	1400	x17872
1411B	Fair Numbers brute force, number theory	1000	x17703
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17496
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17470
664A	Complicated GCD math, number theory	800	x17361
1736B	Playing with GCD math, number theory	1200	x17208
1810B	Candies constructive algorithms, math, number theory	800	x17114
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17009
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x16974

←