Problemset - Codeforces

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number theory

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Problems

#	Name
1005D	Polycarp and Div 3 dp, greedy, number theory	1500	x9825
1366D	Two Divisors constructive algorithms, math, number theory	2000	x9919
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10036
758B	Blown Garland brute force, implementation, number theory	1100	x10058
1877C	Joyboard math, number theory	1200	x10063
1143B	Nirvana brute force, math, number theory	1200	x10067
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10233
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10638
946B	Weird Subtraction Process math, number theory	1100	x10671
630J	Divisibility math, number theory	1100	x10686
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10778
371B	Fox Dividing Cheese math, number theory	1300	x10912
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10940
787A	The Monster brute force, math, number theory	1200	x11048
1068B	LCM math, number theory	1200	x11092
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11246
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11257
1220B	Multiplication Table math, number theory	1300	x11338
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11376
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11523
1811E	Living Sequence binary search, dp, math, number theory	1500	x11561
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11586
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11620
1823C	Strongly Composite greedy, math, number theory	1300	x11669
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11715
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11805
1920C	Partitioning the Array brute force, math, number theory	1600	x11809
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11841
1537D	Deleting Divisors games, math, number theory	1700	x11862
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11924
75C	Modified GCD binary search, number theory	1600	x12004
1753B	Factorial Divisibility math, number theory	1600	x12046
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12096
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12209
1759D	Make It Round brute force, number theory	1400	x12236
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12242
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12274
707C	Pythagorean Triples math, number theory	1500	x12305
633A	Ebony and Ivory brute force, math, number theory	1100	x12311
1133B	Preparation for International Women's Day math, number theory	1200	x12351
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12373
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12473
1076B	Divisor Subtraction implementation, math, number theory	1200	x12538
1444A	Division brute force, math, number theory	1500	x12563
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12590
735D	Taxes math, number theory	1600	x12653
1765M	Minimum LCM math, number theory	1000	x12662
1787B	Number Factorization greedy, math, number theory	1100	x12699
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12787
1758C	Almost All Multiples greedy, number theory	1400	x12913
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13059
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13068
576A	Vasya and Petya's Game math, number theory	1500	x13171
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13247
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13248
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13347
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13433
236B	Easy Number Challenge implementation, number theory	1300	x13478
1542C	Strange Function math, number theory	1600	x13523
1583A	Windblume Ode math, number theory	800	x13530
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13561
1342C	Yet Another Counting Problem math, number theory	1600	x13602
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13612
1606C	Banknotes greedy, number theory	1400	x13746
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13881
1245A	Good ol' Numbers Coloring math, number theory	1000	x13890
797A	k-Factorization implementation, math, number theory	1100	x14002
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14045
1514C	Product 1 Modulo N greedy, number theory	1600	x14307
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14354
1881D	Divide and Equalize math, number theory	1300	x14388
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14417
84A	Toy Army math, number theory	900	x14573
1277B	Make Them Odd greedy, number theory	1200	x14629
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14684
1107B	Digital root math, number theory	1000	x14827
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14963
17A	Noldbach problem brute force, math, number theory	1000	x15086
1165D	Almost All Divisors math, number theory	1600	x15169
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15189
1764B	Doremy's Perfect Math Class math, number theory	900	x15266
1714E	Add Modulo 10 brute force, math, number theory	1400	x15281
1954C	Long Multiplication greedy, math, number theory	1200	x15534
1826B	Lunatic Never Content math, number theory	1100	x15731
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15821
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15862
1349A	Orac and LCM data structures, math, number theory	1600	x15914
1458A	Row GCD math, number theory	1600	x15972
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15974
456B	Fedya and Maths math, number theory	1200	x16030
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16111
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16193
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16231
573A	Bear and Poker implementation, math, number theory	1300	x16294
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16495
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16561
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16674
1407B	Big Vova brute force, greedy, math, number theory	1300	x16680
235A	LCM Challenge number theory	1600	x16821
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16933