Problemset - Codeforces

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number theory

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Problems

#	Name
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13062
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16101
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13209
1593D2	Half of Same brute force, math, number theory	1900	x4791
1593D1	All are Same math, number theory	1100	x19560
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2157
1583A	Windblume Ode math, number theory	800	x13528
1582G	Kuzya and Homework data structures, number theory	2600	x560
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13243
1579F	Array Stabilization (AND version) brute force, graphs, math, number theory, shortest paths	1700	x4566
1575G	GCD Festival math, number theory	2200	x640
1575C	Cyclic Sum data structures, fft, number theory	3000	x154
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x119
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x373
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19165
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5386
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2214
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4607
1554E	You dfs and similar, dp, math, number theory	2600	x1179
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x973
1553A	Digits Sum math, number theory	800	x30123
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x316
1549A	Gregor and Cryptography math, number theory	800	x31321
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x237
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1427
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9290
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5492
1543A	Exciting Bets greedy, math, number theory	900	x26368
1542C	Strange Function math, number theory	1600	x13506
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x22041
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26448
1538F	Interesting Function binary search, dp, math, number theory	1500	x18327
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13039
1537D	Deleting Divisors games, math, number theory	1700	x11843
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13544
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29583
1526B	I Hate 1111 dp, math, number theory	1400	x28655
1525A	Potion-making math, number theory	800	x25064
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20745
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35304
1520B	Ordinary Numbers brute force, math, number theory	800	x42799
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15952
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4091
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x934
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24125
1514C	Product 1 Modulo N greedy, number theory	1600	x14274
1514A	Perfectly Imperfect Array math, number theory	800	x23786
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5038
1512G	Short Task brute force, dp, math, number theory	1700	x7796
1511B	GCD Length constructive algorithms, math, number theory	1100	x21953
1510D	Digits dp, math, number theory	2100	x1798
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x739
1505B	DMCA *special problem, implementation, number theory	1600	x5998
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x1984
1499D	The Number of Pairs dp, math, number theory	2100	x5453
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1561
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8028
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1481
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x374
1493D	GCD of an Array brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers	2100	x4737
1491E	Fib-tree brute force, dfs and similar, divide and conquer, number theory, trees	2400	x2042
1488G	Painting Numbers *special problem, data structures, greedy, number theory	2500	x117
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x17008
1487B	Cat Cycle math, number theory	1200	x19629
1485D	Multiples and Power Differences constructive algorithms, graphs, math, number theory	2200	x4938
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9515
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20798
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x183
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5668
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6401
1475A	Odd Divisor math, number theory	900	x55117
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26302
1473B	String LCM brute force, math, number theory, strings	1000	x29659
1471A	Strange Partition greedy, math, number theory	900	x24494
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6145
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9146
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x312
1468F	Full Turn geometry, hashing, number theory	1700	x3587
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16219
1458A	Row GCD math, number theory	1600	x15952
1455A	Strange Functions math, number theory	800	x26017
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19726
1444A	Division brute force, math, number theory	1500	x12552
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x493
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1264
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x4654
1422F	Boring Queries data structures, math, number theory	2700	x970
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3138
1418F	Equal Product data structures, math, number theory, two pointers	3000	x355
1411B	Fair Numbers brute force, number theory	1000	x17779
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22731
1407B	Big Vova brute force, greedy, math, number theory	1300	x16676
1406E	Deleting Numbers interactive, math, number theory	2600	x1548
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x983
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x8857
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23423
1398G	Running Competition bitmasks, fft, math, number theory	2600	x770
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14350
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14956
1389E	Calendar Ambiguity math, number theory	2200	x3109