Problemset - Codeforces

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Before contest
Codeforces Round 941 (Div. 1)
4 days

Before contest
Codeforces Round 941 (Div. 2)
4 days

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Difficulty: —

number theory

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Problems

#	Name
122A	Lucky Division brute force, number theory	1000	x115447
230B	T-primes binary search, implementation, math, number theory	1300	x69535
630A	Again Twenty Five! number theory	800	x61504
472A	Design Tutorial: Learn from Math math, number theory	800	x56776
1475A	Odd Divisor math, number theory	900	x54759
313A	Ilya and Bank Account implementation, number theory	900	x53349
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48504
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46262
1520B	Ordinary Numbers brute force, math, number theory	800	x42643
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39673
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38181
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x37943
577A	Multiplication Table implementation, number theory	1000	x37915
1899A	Game with Integers games, math, number theory	800	x37103
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35195
1294C	Product of Three Numbers greedy, math, number theory	1300	x32104
822A	I'm bored with life implementation, math, number theory	800	x31578
1549A	Gregor and Cryptography math, number theory	800	x31214
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x30932
1360D	Buying Shovels math, number theory	1300	x30614
1553A	Digits Sum math, number theory	800	x30042
1473B	String LCM brute force, math, number theory, strings	1000	x29561
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29502
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29473
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29316
1859A	United We Stand constructive algorithms, math, number theory	800	x29004
1526B	I Hate 1111 dp, math, number theory	1400	x28490
26A	Almost Prime number theory	900	x28362
1768A	Greatest Convex greedy, math, number theory	800	x27873
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26710
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26684
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26348
1543A	Exciting Bets greedy, math, number theory	900	x26244
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26186
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26027
1455A	Strange Functions math, number theory	800	x25976
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25250
1324A	Yet Another Tetris Problem implementation, number theory	900	x25210
1525A	Potion-making math, number theory	800	x25033
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x24966
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24522
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24406
1471A	Strange Partition greedy, math, number theory	900	x24385
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24362
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24068
1514A	Perfectly Imperfect Array math, number theory	800	x23761
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23514
1370C	Number Game games, math, number theory	1400	x23468
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23413
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23376
1238A	Prime Subtraction math, number theory	900	x23189
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23042
1629B	GCD Arrays greedy, math, number theory	800	x22931
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22702
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22321
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22314
483A	Counterexample brute force, implementation, math, number theory	1100	x22112
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x21962
1511B	GCD Length constructive algorithms, math, number theory	1100	x21911
1285C	Fadi and LCM brute force, math, number theory	1400	x21874
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21827
1872C	Non-coprime Split math, number theory	1100	x21816
1679A	AvtoBus brute force, greedy, math, number theory	900	x21688
1720A	Burenka Plays with Fractions math, number theory	900	x21668
1742D	Coprime brute force, greedy, number theory	1100	x21410
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21205
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20706
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20694
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20692
1350B	Orac and Models dp, math, number theory	1400	x20486
1828B	Permutation Swap math, number theory	900	x20462
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20381
1605A	A.M. Deviation math, number theory	800	x20307
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20130
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19669
1487B	Cat Cycle math, number theory	1200	x19555
1740A	Factorise N+M constructive algorithms, number theory	800	x19552
1593D1	All are Same math, number theory	1100	x19523
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19309
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19218
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x19189
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19145
1717A	Madoka and Strange Thoughts math, number theory	800	x19093
1945B	Fireworks math, number theory	900	x18911
1762A	Divide and Conquer greedy, math, number theory	800	x18493
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18426
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18337
1538F	Interesting Function binary search, dp, math, number theory	1500	x18263
1932B	Chaya Calendar number theory	1100	x18056
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18025
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17869
762A	k-th divisor math, number theory	1400	x17861
1411B	Fair Numbers brute force, number theory	1000	x17684
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17492
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17408
664A	Complicated GCD math, number theory	800	x17352
1736B	Playing with GCD math, number theory	1200	x17192
1810B	Candies constructive algorithms, math, number theory	800	x17106
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17006
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x16962

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