Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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Difficulty: —

number theory

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Problems

#	Name
1877C	Joyboard math, number theory	1200	x9949
758B	Blown Garland brute force, implementation, number theory	1100	x10021
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10133
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10527
630J	Divisibility math, number theory	1100	x10638
946B	Weird Subtraction Process math, number theory	1100	x10650
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10673
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10728
371B	Fox Dividing Cheese math, number theory	1300	x10868
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x10882
787A	The Monster brute force, math, number theory	1200	x11020
1068B	LCM math, number theory	1200	x11024
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11104
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11168
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11292
1220B	Multiplication Table math, number theory	1300	x11323
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11433
1811E	Living Sequence binary search, dp, math, number theory	1500	x11454
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11493
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11554
1920C	Partitioning the Array brute force, math, number theory	1600	x11591
1823C	Strongly Composite greedy, math, number theory	1300	x11602
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11606
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11770
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11793
1537D	Deleting Divisors games, math, number theory	1700	x11807
75C	Modified GCD binary search, number theory	1600	x11929
1759D	Make It Round brute force, number theory	1400	x11936
1753B	Factorial Divisibility math, number theory	1600	x11954
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12036
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12064
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12068
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12252
707C	Pythagorean Triples math, number theory	1500	x12258
633A	Ebony and Ivory brute force, math, number theory	1100	x12266
1133B	Preparation for International Women's Day math, number theory	1200	x12308
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12319
1765M	Minimum LCM math, number theory	1000	x12407
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12449
1076B	Divisor Subtraction implementation, math, number theory	1200	x12497
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12504
1444A	Division brute force, math, number theory	1500	x12507
735D	Taxes math, number theory	1600	x12596
1787B	Number Factorization greedy, math, number theory	1100	x12641
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12698
1758C	Almost All Multiples greedy, number theory	1400	x12823
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x12977
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13031
1954C	Long Multiplication greedy, math, number theory	1200	x13047
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13055
576A	Vasya and Petya's Game math, number theory	1500	x13127
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13223
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13271
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13336
236B	Easy Number Challenge implementation, number theory	1300	x13385
1542C	Strange Function math, number theory	1600	x13455
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13469
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13492
1583A	Windblume Ode math, number theory	800	x13522
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13565
1342C	Yet Another Counting Problem math, number theory	1600	x13574
1606C	Banknotes greedy, number theory	1400	x13688
797A	k-Factorization implementation, math, number theory	1100	x13853
1245A	Good ol' Numbers Coloring math, number theory	1000	x13865
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x13984
1881D	Divide and Equalize math, number theory	1300	x14131
1514C	Product 1 Modulo N greedy, number theory	1600	x14144
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14328
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14359
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14512
84A	Toy Army math, number theory	900	x14514
1277B	Make Them Odd greedy, number theory	1200	x14584
1107B	Digital root math, number theory	1000	x14771
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14918
17A	Noldbach problem brute force, math, number theory	1000	x14940
1165D	Almost All Divisors math, number theory	1600	x14948
1714E	Add Modulo 10 brute force, math, number theory	1400	x15111
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15166
1764B	Doremy's Perfect Math Class math, number theory	900	x15194
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15455
1826B	Lunatic Never Content math, number theory	1100	x15573
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15725
1349A	Orac and LCM data structures, math, number theory	1600	x15824
1458A	Row GCD math, number theory	1600	x15863
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15878
456B	Fedya and Maths math, number theory	1200	x15941
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16068
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16135
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16169
573A	Bear and Poker implementation, math, number theory	1300	x16256
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16421
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16442
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16623
1407B	Big Vova brute force, greedy, math, number theory	1300	x16654
235A	LCM Challenge number theory	1600	x16720
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16758
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x16871
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16884
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x16918
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x16990