Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 945 (Div. 2)
43:54:42
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
757B	Bash's Big Day greedy, math, number theory	1400	x9864
1366D	Two Divisors constructive algorithms, math, number theory	2000	x9929
758B	Blown Garland brute force, implementation, number theory	1100	x10062
1143B	Nirvana brute force, math, number theory	1200	x10072
1877C	Joyboard math, number theory	1200	x10086
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10089
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10254
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10658
946B	Weird Subtraction Process math, number theory	1100	x10672
630J	Divisibility math, number theory	1100	x10693
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10801
371B	Fox Dividing Cheese math, number theory	1300	x10920
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10959
787A	The Monster brute force, math, number theory	1200	x11052
1068B	LCM math, number theory	1200	x11102
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11255
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11259
1220B	Multiplication Table math, number theory	1300	x11342
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11390
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11547
1811E	Living Sequence binary search, dp, math, number theory	1500	x11590
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11593
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11640
1823C	Strongly Composite greedy, math, number theory	1300	x11686
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11757
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11808
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11852
1920C	Partitioning the Array brute force, math, number theory	1600	x11856
1537D	Deleting Divisors games, math, number theory	1700	x11882
75C	Modified GCD binary search, number theory	1600	x12017
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12058
1753B	Factorial Divisibility math, number theory	1600	x12069
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12097
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12247
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12277
1759D	Make It Round brute force, number theory	1400	x12286
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12296
707C	Pythagorean Triples math, number theory	1500	x12308
633A	Ebony and Ivory brute force, math, number theory	1100	x12326
1133B	Preparation for International Women's Day math, number theory	1200	x12375
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12414
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12473
1076B	Divisor Subtraction implementation, math, number theory	1200	x12565
1444A	Division brute force, math, number theory	1500	x12574
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12616
1787B	Number Factorization greedy, math, number theory	1100	x12715
1765M	Minimum LCM math, number theory	1000	x12733
735D	Taxes math, number theory	1600	x12734
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12814
1758C	Almost All Multiples greedy, number theory	1400	x12932
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13079
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13080
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13261
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13282
576A	Vasya and Petya's Game math, number theory	1500	x13319
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13356
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13468
236B	Easy Number Challenge implementation, number theory	1300	x13497
1583A	Windblume Ode math, number theory	800	x13533
1542C	Strange Function math, number theory	1600	x13542
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13578
1342C	Yet Another Counting Problem math, number theory	1600	x13609
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13627
1606C	Banknotes greedy, number theory	1400	x13762
1245A	Good ol' Numbers Coloring math, number theory	1000	x13898
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13956
797A	k-Factorization implementation, math, number theory	1100	x14053
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14061
1514C	Product 1 Modulo N greedy, number theory	1600	x14334
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14362
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14437
1881D	Divide and Equalize math, number theory	1300	x14531
84A	Toy Army math, number theory	900	x14589
1277B	Make Them Odd greedy, number theory	1200	x14644
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14744
1107B	Digital root math, number theory	1000	x14838
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14972
17A	Noldbach problem brute force, math, number theory	1000	x15117
1165D	Almost All Divisors math, number theory	1600	x15196
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15201
1764B	Doremy's Perfect Math Class math, number theory	900	x15276
1714E	Add Modulo 10 brute force, math, number theory	1400	x15316
1954C	Long Multiplication greedy, math, number theory	1200	x15803
1826B	Lunatic Never Content math, number theory	1100	x15813
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15892
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15900
1349A	Orac and LCM data structures, math, number theory	1600	x15944
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x16005
1458A	Row GCD math, number theory	1600	x16021
456B	Fedya and Maths math, number theory	1200	x16039
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16160
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16203
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16244
573A	Bear and Poker implementation, math, number theory	1300	x16302
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16576
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16605
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16686
1407B	Big Vova brute force, greedy, math, number theory	1300	x16690
235A	LCM Challenge number theory	1600	x16843
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16940