Problemset - Codeforces

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Codeforces Round 942 (Div. 1)
01:47:52

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Codeforces Round 942 (Div. 2)
01:47:52

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number theory

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Problems

#	Name
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x16963
1816A	Ian Visits Mary constructive algorithms, geometry, number theory	800	x16917
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16882
235A	LCM Challenge number theory	1600	x16782
1407B	Big Vova brute force, greedy, math, number theory	1300	x16669
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x16652
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16507
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x16473
573A	Bear and Poker implementation, math, number theory	1300	x16279
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16203
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16162
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16090
456B	Fedya and Maths math, number theory	1200	x15972
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15931
1458A	Row GCD math, number theory	1600	x15928
1349A	Orac and LCM data structures, math, number theory	1600	x15871
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15808
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15666
1826B	Lunatic Never Content math, number theory	1100	x15651
1764B	Doremy's Perfect Math Class math, number theory	900	x15237
1714E	Add Modulo 10 brute force, math, number theory	1400	x15202
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15173
1165D	Almost All Divisors math, number theory	1600	x15125
17A	Noldbach problem brute force, math, number theory	1000	x15009
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14946
1954C	Long Multiplication greedy, math, number theory	1200	x14823
1107B	Digital root math, number theory	1000	x14805
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14662
1277B	Make Them Odd greedy, number theory	1200	x14609
84A	Toy Army math, number theory	900	x14548
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14394
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14344
1881D	Divide and Equalize math, number theory	1300	x14264
1514C	Product 1 Modulo N greedy, number theory	1600	x14253
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14015
797A	k-Factorization implementation, math, number theory	1100	x13924
1245A	Good ol' Numbers Coloring math, number theory	1000	x13882
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13731
1606C	Banknotes greedy, number theory	1400	x13716
1342C	Yet Another Counting Problem math, number theory	1600	x13586
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13557
1583A	Windblume Ode math, number theory	800	x13526
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13524
1542C	Strange Function math, number theory	1600	x13493
236B	Easy Number Challenge implementation, number theory	1300	x13444
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13402
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13318
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13240
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13158
576A	Vasya and Petya's Game math, number theory	1500	x13154
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13053
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13021
1758C	Almost All Multiples greedy, number theory	1400	x12871
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12750
1787B	Number Factorization greedy, math, number theory	1100	x12670
735D	Taxes math, number theory	1600	x12622
1765M	Minimum LCM math, number theory	1000	x12553
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12552
1444A	Division brute force, math, number theory	1500	x12543
1076B	Divisor Subtraction implementation, math, number theory	1200	x12527
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12467
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12346
1133B	Preparation for International Women's Day math, number theory	1200	x12327
633A	Ebony and Ivory brute force, math, number theory	1100	x12289
707C	Pythagorean Triples math, number theory	1500	x12271
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12267
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12174
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12131
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12078
1759D	Make It Round brute force, number theory	1400	x12021
1753B	Factorial Divisibility math, number theory	1600	x12011
75C	Modified GCD binary search, number theory	1600	x11966
1537D	Deleting Divisors games, math, number theory	1700	x11828
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11817
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11788
1920C	Partitioning the Array brute force, math, number theory	1600	x11721
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11654
1823C	Strongly Composite greedy, math, number theory	1300	x11640
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11589
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11534
1811E	Living Sequence binary search, dp, math, number theory	1500	x11509
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11486
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11473
1220B	Multiplication Table math, number theory	1300	x11331
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11310
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x11236
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11201
1068B	LCM math, number theory	1200	x11075
787A	The Monster brute force, math, number theory	1200	x11028
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10911
371B	Fox Dividing Cheese math, number theory	1300	x10894
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10747
630J	Divisibility math, number theory	1100	x10669
946B	Weird Subtraction Process math, number theory	1100	x10657
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10591
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10177
758B	Blown Garland brute force, implementation, number theory	1100	x10034
1877C	Joyboard math, number theory	1200	x10012
1143B	Nirvana brute force, math, number theory	1200	x10009
1366D	Two Divisors constructive algorithms, math, number theory	2000	x9888