Problemset - Codeforces

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number theory

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Problems

#	Name
122A	Lucky Division brute force, number theory	1000	x116300
230B	T-primes binary search, implementation, math, number theory	1300	x69983
630A	Again Twenty Five! number theory	800	x62117
472A	Design Tutorial: Learn from Math math, number theory	800	x57066
1475A	Odd Divisor math, number theory	900	x55343
313A	Ilya and Bank Account implementation, number theory	900	x53659
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48843
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46595
1520B	Ordinary Numbers brute force, math, number theory	800	x42879
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39937
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38416
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x38227
577A	Multiplication Table implementation, number theory	1000	x38104
1899A	Game with Integers games, math, number theory	800	x38009
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35348
1294C	Product of Three Numbers greedy, math, number theory	1300	x32359
822A	I'm bored with life implementation, math, number theory	800	x31713
1549A	Gregor and Cryptography math, number theory	800	x31357
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31158
1360D	Buying Shovels math, number theory	1300	x30817
1553A	Digits Sum math, number theory	800	x30163
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29946
1473B	String LCM brute force, math, number theory, strings	1000	x29713
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29624
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29467
1859A	United We Stand constructive algorithms, math, number theory	800	x29378
1526B	I Hate 1111 dp, math, number theory	1400	x28738
26A	Almost Prime number theory	900	x28620
1768A	Greatest Convex greedy, math, number theory	800	x28020
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26903
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26802
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26527
1543A	Exciting Bets greedy, math, number theory	900	x26428
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26372
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26173
1455A	Strange Functions math, number theory	800	x26042
1968A	Maximize? brute force, math, number theory	800	x25699
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25331
1324A	Yet Another Tetris Problem implementation, number theory	900	x25310
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25127
1525A	Potion-making math, number theory	800	x25072
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24614
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24554
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24549
1471A	Strange Partition greedy, math, number theory	900	x24548
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24163
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23817
1514A	Perfectly Imperfect Array math, number theory	800	x23801
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23631
1370C	Number Game games, math, number theory	1400	x23555
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23449
1238A	Prime Subtraction math, number theory	900	x23280
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23103
1629B	GCD Arrays greedy, math, number theory	800	x22976
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22744
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22435
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22425
483A	Counterexample brute force, implementation, math, number theory	1100	x22230
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x22090
1872C	Non-coprime Split math, number theory	1100	x22009
1285C	Fadi and LCM brute force, math, number theory	1400	x21997
1511B	GCD Length constructive algorithms, math, number theory	1100	x21972
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21955
1679A	AvtoBus brute force, greedy, math, number theory	900	x21905
1720A	Burenka Plays with Fractions math, number theory	900	x21762
1742D	Coprime brute force, greedy, number theory	1100	x21708
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21250
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20876
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20835
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20774
1828B	Permutation Swap math, number theory	900	x20674
1350B	Orac and Models dp, math, number theory	1400	x20612
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20518
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20496
1605A	A.M. Deviation math, number theory	800	x20335
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20322
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19756
1945B	Fireworks math, number theory	900	x19669
1487B	Cat Cycle math, number theory	1200	x19667
1740A	Factorise N+M constructive algorithms, number theory	800	x19612
1593D1	All are Same math, number theory	1100	x19574
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19338
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19320
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19177
1717A	Madoka and Strange Thoughts math, number theory	800	x19154
1762A	Divide and Conquer greedy, math, number theory	800	x18560
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18502
1932B	Chaya Calendar number theory	1100	x18391
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18368
1538F	Interesting Function binary search, dp, math, number theory	1500	x18363
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18224
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x18181
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18116
762A	k-th divisor math, number theory	1400	x18052
1411B	Fair Numbers brute force, number theory	1000	x17827
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17786
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17533
664A	Complicated GCD math, number theory	800	x17431
1736B	Playing with GCD math, number theory	1200	x17272
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17228

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