Problemset - Codeforces

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number theory

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Problems

#	Name
1810B	Candies constructive algorithms, math, number theory	800	x17144
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17085
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x17058
1789A	Serval and Mocha's Array brute force, math, number theory	800	x17053
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16936
235A	LCM Challenge number theory	1600	x16835
1407B	Big Vova brute force, greedy, math, number theory	1300	x16684
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16679
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16578
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16538
573A	Bear and Poker implementation, math, number theory	1300	x16296
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16238
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16198
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16126
456B	Fedya and Maths math, number theory	1200	x16035
1458A	Row GCD math, number theory	1600	x15990
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15986
1349A	Orac and LCM data structures, math, number theory	1600	x15929
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15876
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15862
1826B	Lunatic Never Content math, number theory	1100	x15767
1954C	Long Multiplication greedy, math, number theory	1200	x15656
1714E	Add Modulo 10 brute force, math, number theory	1400	x15295
1764B	Doremy's Perfect Math Class math, number theory	900	x15269
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15191
1165D	Almost All Divisors math, number theory	1600	x15179
17A	Noldbach problem brute force, math, number theory	1000	x15101
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14968
1107B	Digital root math, number theory	1000	x14835
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14703
1277B	Make Them Odd greedy, number theory	1200	x14635
84A	Toy Army math, number theory	900	x14578
1881D	Divide and Equalize math, number theory	1300	x14458
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14425
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14357
1514C	Product 1 Modulo N greedy, number theory	1600	x14321
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14055
797A	k-Factorization implementation, math, number theory	1100	x14020
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13912
1245A	Good ol' Numbers Coloring math, number theory	1000	x13892
1606C	Banknotes greedy, number theory	1400	x13756
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13621
1342C	Yet Another Counting Problem math, number theory	1600	x13604
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13568
1583A	Windblume Ode math, number theory	800	x13532
1542C	Strange Function math, number theory	1600	x13531
236B	Easy Number Challenge implementation, number theory	1300	x13487
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13451
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13354
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13265
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13249
576A	Vasya and Petya's Game math, number theory	1500	x13176
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13072
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13067
1758C	Almost All Multiples greedy, number theory	1400	x12917
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12802
1787B	Number Factorization greedy, math, number theory	1100	x12704
1765M	Minimum LCM math, number theory	1000	x12689
735D	Taxes math, number theory	1600	x12681
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12603
1444A	Division brute force, math, number theory	1500	x12566
1076B	Divisor Subtraction implementation, math, number theory	1200	x12547
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12473
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12382
1133B	Preparation for International Women's Day math, number theory	1200	x12364
633A	Ebony and Ivory brute force, math, number theory	1100	x12317
707C	Pythagorean Triples math, number theory	1500	x12306
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12276
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12259
1759D	Make It Round brute force, number theory	1400	x12256
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12224
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12096
1753B	Factorial Divisibility math, number theory	1600	x12060
75C	Modified GCD binary search, number theory	1600	x12010
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11989
1537D	Deleting Divisors games, math, number theory	1700	x11867
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11848
1920C	Partitioning the Array brute force, math, number theory	1600	x11831
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11806
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11734
1823C	Strongly Composite greedy, math, number theory	1300	x11675
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11631
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11590
1811E	Living Sequence binary search, dp, math, number theory	1500	x11575
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11539
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11383
1220B	Multiplication Table math, number theory	1300	x11338
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11258
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11247
1068B	LCM math, number theory	1200	x11097
787A	The Monster brute force, math, number theory	1200	x11051
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10952
371B	Fox Dividing Cheese math, number theory	1300	x10917
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10789
630J	Divisibility math, number theory	1100	x10688
946B	Weird Subtraction Process math, number theory	1100	x10671
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10649
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10247
1877C	Joyboard math, number theory	1200	x10072
1143B	Nirvana brute force, math, number theory	1200	x10072