Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
33:03:43
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Before contest
Codeforces Round 941 (Div. 2)
33:03:43
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number theory

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Problems

#	Name
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x16942
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16909
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16846
235A	LCM Challenge number theory	1600	x16764
1407B	Big Vova brute force, greedy, math, number theory	1300	x16662
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16641
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16475
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16459
573A	Bear and Poker implementation, math, number theory	1300	x16268
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16190
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16151
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16082
456B	Fedya and Maths math, number theory	1200	x15963
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15915
1458A	Row GCD math, number theory	1600	x15907
1349A	Orac and LCM data structures, math, number theory	1600	x15851
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15757
1826B	Lunatic Never Content math, number theory	1100	x15628
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15608
1764B	Doremy's Perfect Math Class math, number theory	900	x15222
1714E	Add Modulo 10 brute force, math, number theory	1400	x15177
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15170
1165D	Almost All Divisors math, number theory	1600	x15064
17A	Noldbach problem brute force, math, number theory	1000	x14994
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14934
1107B	Digital root math, number theory	1000	x14799
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14646
1277B	Make Them Odd greedy, number theory	1200	x14597
84A	Toy Army math, number theory	900	x14534
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14382
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14339
1954C	Long Multiplication greedy, math, number theory	1200	x14332
1881D	Divide and Equalize math, number theory	1300	x14214
1514C	Product 1 Modulo N greedy, number theory	1600	x14213
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14009
797A	k-Factorization implementation, math, number theory	1100	x13905
1245A	Good ol' Numbers Coloring math, number theory	1000	x13877
1606C	Banknotes greedy, number theory	1400	x13711
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13673
1342C	Yet Another Counting Problem math, number theory	1600	x13584
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13529
1583A	Windblume Ode math, number theory	800	x13526
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13515
1542C	Strange Function math, number theory	1600	x13482
236B	Easy Number Challenge implementation, number theory	1300	x13420
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13365
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13283
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13237
576A	Vasya and Petya's Game math, number theory	1500	x13144
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13131
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13045
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13011
1758C	Almost All Multiples greedy, number theory	1400	x12857
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12737
1787B	Number Factorization greedy, math, number theory	1100	x12652
735D	Taxes math, number theory	1600	x12615
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12535
1444A	Division brute force, math, number theory	1500	x12526
1076B	Divisor Subtraction implementation, math, number theory	1200	x12518
1765M	Minimum LCM math, number theory	1000	x12507
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12461
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12330
1133B	Preparation for International Women's Day math, number theory	1200	x12317
633A	Ebony and Ivory brute force, math, number theory	1100	x12285
707C	Pythagorean Triples math, number theory	1500	x12266
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12260
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12123
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12094
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12075
1759D	Make It Round brute force, number theory	1400	x12001
1753B	Factorial Divisibility math, number theory	1600	x11985
75C	Modified GCD binary search, number theory	1600	x11952
1537D	Deleting Divisors games, math, number theory	1700	x11819
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11810
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11782
1920C	Partitioning the Array brute force, math, number theory	1600	x11691
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11640
1823C	Strongly Composite greedy, math, number theory	1300	x11627
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11576
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11505
1811E	Living Sequence binary search, dp, math, number theory	1500	x11494
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11462
1220B	Multiplication Table math, number theory	1300	x11330
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11305
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11270
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11187
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11155
1068B	LCM math, number theory	1200	x11065
787A	The Monster brute force, math, number theory	1200	x11026
371B	Fox Dividing Cheese math, number theory	1300	x10887
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10861
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10723
946B	Weird Subtraction Process math, number theory	1100	x10655
630J	Divisibility math, number theory	1100	x10654
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10568
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10163
758B	Blown Garland brute force, implementation, number theory	1100	x10032
1877C	Joyboard math, number theory	1200	x9991
1143B	Nirvana brute force, math, number theory	1200	x9905
1366D	Two Divisors constructive algorithms, math, number theory	2000	x9859