Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
2 days
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number theory

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Problems

#	Name
122A	Lucky Division brute force, number theory	1000	x116398
230B	T-primes binary search, implementation, math, number theory	1300	x70099
630A	Again Twenty Five! number theory	800	x62168
472A	Design Tutorial: Learn from Math math, number theory	800	x57095
1475A	Odd Divisor math, number theory	900	x55405
313A	Ilya and Bank Account implementation, number theory	900	x53686
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48922
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46653
1520B	Ordinary Numbers brute force, math, number theory	800	x42919
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39965
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38442
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x38252
577A	Multiplication Table implementation, number theory	1000	x38126
1899A	Game with Integers games, math, number theory	800	x38120
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35373
1294C	Product of Three Numbers greedy, math, number theory	1300	x32383
822A	I'm bored with life implementation, math, number theory	800	x31729
1549A	Gregor and Cryptography math, number theory	800	x31371
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31178
1360D	Buying Shovels math, number theory	1300	x30837
1553A	Digits Sum math, number theory	800	x30174
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29990
1473B	String LCM brute force, math, number theory, strings	1000	x29729
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29634
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29478
1859A	United We Stand constructive algorithms, math, number theory	800	x29431
1526B	I Hate 1111 dp, math, number theory	1400	x28760
26A	Almost Prime number theory	900	x28673
1768A	Greatest Convex greedy, math, number theory	800	x28029
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26926
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26811
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26547
1543A	Exciting Bets greedy, math, number theory	900	x26450
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26412
1968A	Maximize? brute force, math, number theory	800	x26240
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26189
1455A	Strange Functions math, number theory	800	x26042
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25336
1324A	Yet Another Tetris Problem implementation, number theory	900	x25314
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25150
1525A	Potion-making math, number theory	800	x25075
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24649
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24572
1471A	Strange Partition greedy, math, number theory	900	x24572
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24554
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24179
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23856
1514A	Perfectly Imperfect Array math, number theory	800	x23805
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23676
1370C	Number Game games, math, number theory	1400	x23563
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23456
1238A	Prime Subtraction math, number theory	900	x23292
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23108
1629B	GCD Arrays greedy, math, number theory	800	x22982
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22754
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22446
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22438
483A	Counterexample brute force, implementation, math, number theory	1100	x22248
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x22101
1285C	Fadi and LCM brute force, math, number theory	1400	x22050
1872C	Non-coprime Split math, number theory	1100	x22030
1511B	GCD Length constructive algorithms, math, number theory	1100	x21985
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21975
1679A	AvtoBus brute force, greedy, math, number theory	900	x21945
1720A	Burenka Plays with Fractions math, number theory	900	x21768
1742D	Coprime brute force, greedy, number theory	1100	x21745
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21261
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20890
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20849
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20782
1828B	Permutation Swap math, number theory	900	x20708
1350B	Orac and Models dp, math, number theory	1400	x20623
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20547
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20528
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20389
1605A	A.M. Deviation math, number theory	800	x20340
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19761
1945B	Fireworks math, number theory	900	x19738
1487B	Cat Cycle math, number theory	1200	x19690
1740A	Factorise N+M constructive algorithms, number theory	800	x19621
1593D1	All are Same math, number theory	1100	x19588
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19368
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19341
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19184
1717A	Madoka and Strange Thoughts math, number theory	800	x19160
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x18690
1762A	Divide and Conquer greedy, math, number theory	800	x18572
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18514
1932B	Chaya Calendar number theory	1100	x18440
1538F	Interesting Function binary search, dp, math, number theory	1500	x18374
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18372
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18256
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18142
762A	k-th divisor math, number theory	1400	x18105
1411B	Fair Numbers brute force, number theory	1000	x17844
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17843
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17535
664A	Complicated GCD math, number theory	800	x17438
1736B	Playing with GCD math, number theory	1200	x17282
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17256

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