Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
41:47:33
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number theory

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Problems

#	Name
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x16898
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16889
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16774
235A	LCM Challenge number theory	1600	x16725
1407B	Big Vova brute force, greedy, math, number theory	1300	x16655
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16625
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16445
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16433
573A	Bear and Poker implementation, math, number theory	1300	x16261
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16171
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16140
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16071
456B	Fedya and Maths math, number theory	1200	x15945
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15884
1458A	Row GCD math, number theory	1600	x15873
1349A	Orac and LCM data structures, math, number theory	1600	x15828
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15726
1826B	Lunatic Never Content math, number theory	1100	x15583
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15480
1764B	Doremy's Perfect Math Class math, number theory	900	x15197
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15166
1714E	Add Modulo 10 brute force, math, number theory	1400	x15125
1165D	Almost All Divisors math, number theory	1600	x14953
17A	Noldbach problem brute force, math, number theory	1000	x14948
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14920
1107B	Digital root math, number theory	1000	x14773
1277B	Make Them Odd greedy, number theory	1200	x14586
84A	Toy Army math, number theory	900	x14517
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14514
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14363
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14331
1514C	Product 1 Modulo N greedy, number theory	1600	x14148
1881D	Divide and Equalize math, number theory	1300	x14147
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x13985
1245A	Good ol' Numbers Coloring math, number theory	1000	x13867
797A	k-Factorization implementation, math, number theory	1100	x13862
1606C	Banknotes greedy, number theory	1400	x13694
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13589
1342C	Yet Another Counting Problem math, number theory	1600	x13574
1583A	Windblume Ode math, number theory	800	x13522
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13495
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13481
1542C	Strange Function math, number theory	1600	x13461
236B	Easy Number Challenge implementation, number theory	1300	x13391
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13340
1954C	Long Multiplication greedy, math, number theory	1200	x13333
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13277
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13224
576A	Vasya and Petya's Game math, number theory	1500	x13130
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13064
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13033
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x12981
1758C	Almost All Multiples greedy, number theory	1400	x12831
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12703
1787B	Number Factorization greedy, math, number theory	1100	x12643
735D	Taxes math, number theory	1600	x12600
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12509
1444A	Division brute force, math, number theory	1500	x12508
1076B	Divisor Subtraction implementation, math, number theory	1200	x12501
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12453
1765M	Minimum LCM math, number theory	1000	x12420
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12322
1133B	Preparation for International Women's Day math, number theory	1200	x12310
633A	Ebony and Ivory brute force, math, number theory	1100	x12268
707C	Pythagorean Triples math, number theory	1500	x12258
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12254
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12072
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12065
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12044
1753B	Factorial Divisibility math, number theory	1600	x11958
1759D	Make It Round brute force, number theory	1400	x11952
75C	Modified GCD binary search, number theory	1600	x11932
1537D	Deleting Divisors games, math, number theory	1700	x11809
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11797
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11771
1920C	Partitioning the Array brute force, math, number theory	1600	x11619
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11609
1823C	Strongly Composite greedy, math, number theory	1300	x11605
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11562
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11495
1811E	Living Sequence binary search, dp, math, number theory	1500	x11466
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11438
1220B	Multiplication Table math, number theory	1300	x11323
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11296
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11172
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11106
1068B	LCM math, number theory	1200	x11027
787A	The Monster brute force, math, number theory	1200	x11020
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x10950
371B	Fox Dividing Cheese math, number theory	1300	x10872
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10733
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10682
946B	Weird Subtraction Process math, number theory	1100	x10650
630J	Divisibility math, number theory	1100	x10642
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10533
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10140
758B	Blown Garland brute force, implementation, number theory	1100	x10021
1877C	Joyboard math, number theory	1200	x9958
1143B	Nirvana brute force, math, number theory	1200	x9889
1366D	Two Divisors constructive algorithms, math, number theory	2000	x9848