Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
36:38:15
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number theory

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Problems

#	Name
1583A	Windblume Ode math, number theory	800	x13522
1582G	Kuzya and Homework data structures, number theory	2600	x558
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13224
1579F	Array Stabilization (AND version) brute force, graphs, math, number theory, shortest paths	1700	x4556
1575G	GCD Festival math, number theory	2200	x637
1575C	Cyclic Sum data structures, fft, number theory	3000	x152
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x108
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x372
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19138
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5375
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2210
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4590
1554E	You dfs and similar, dp, math, number theory	2600	x1174
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x969
1553A	Digits Sum math, number theory	800	x30032
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x315
1549A	Gregor and Cryptography math, number theory	800	x31197
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x236
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1425
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9238
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5462
1543A	Exciting Bets greedy, math, number theory	900	x26220
1542C	Strange Function math, number theory	1600	x13461
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x21931
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26320
1538F	Interesting Function binary search, dp, math, number theory	1500	x18237
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x12981
1537D	Deleting Divisors games, math, number theory	1700	x11809
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13495
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29485
1526B	I Hate 1111 dp, math, number theory	1400	x28455
1525A	Potion-making math, number theory	800	x25032
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20672
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35165
1520B	Ordinary Numbers brute force, math, number theory	800	x42617
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15884
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4072
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x924
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24061
1514C	Product 1 Modulo N greedy, number theory	1600	x14148
1514A	Perfectly Imperfect Array math, number theory	800	x23751
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5007
1512G	Short Task brute force, dp, math, number theory	1700	x7766
1511B	GCD Length constructive algorithms, math, number theory	1100	x21901
1510D	Digits dp, math, number theory	2100	x1790
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x739
1505B	DMCA *special problem, implementation, number theory	1600	x5982
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1983
1499D	The Number of Pairs dp, math, number theory	2100	x5428
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1555
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8009
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1478
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x372
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4727
1491E	Fib-tree brute force, dfs and similar, divide and conquer, number theory, trees	2400	x2038
1488G	Painting Numbers *special problem, data structures, greedy, number theory	2500	x116
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x16899
1487B	Cat Cycle math, number theory	1200	x19531
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4924
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9494
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20688
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x179
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5648
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6370
1475A	Odd Divisor math, number theory	900	x54650
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26162
1473B	String LCM brute force, math, number theory, strings	1000	x29533
1471A	Strange Partition greedy, math, number theory	900	x24354
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6129
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9124
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x309
1468F	Full Turn geometry, hashing, number theory	1700	x3582
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16172
1458A	Row GCD math, number theory	1600	x15875
1455A	Strange Functions math, number theory	800	x25970
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19654
1444A	Division brute force, math, number theory	1500	x12509
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x484
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1256
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x4644
1422F	Boring Queries data structures, math, number theory	2700	x959
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3131
1418F	Equal Product data structures, math, number theory, two pointers	3000	x350
1411B	Fair Numbers brute force, number theory	1000	x17659
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22694
1407B	Big Vova brute force, greedy, math, number theory	1300	x16655
1406E	Deleting Numbers interactive, math, number theory	2600	x1536
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x981
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x8833
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23367
1398G	Running Competition bitmasks, fft, math, number theory	2600	x759
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14331
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14920
1389E	Calendar Ambiguity math, number theory	2200	x3105
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38156
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24512
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12453
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x75
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x25996
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2290