Problemset - Codeforces

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Codeforces Round 973 (Div. 2)
11:37:56
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number theory

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Problems

#	Name
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x206
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5894
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6775
1475A	Odd Divisor math, number theory	900	x60125
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x28423
1473B	String LCM brute force, math, number theory, strings	1000	x31256
1471A	Strange Partition greedy, math, number theory	900	x26029
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6303
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9409
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x319
1468F	Full Turn geometry, hashing, number theory	1700	x3704
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16685
1458A	Row GCD math, number theory	1600	x17577
1455A	Strange Functions math, number theory	800	x26401
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x20356
1444A	Division brute force, math, number theory	1500	x12990
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x524
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1399
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x4831
1422F	Boring Queries data structures, math, number theory	2700	x1020
1419E	Decryption constructive algorithms, implementation, math, number theory	2100	x3256
1418F	Equal Product data structures, math, number theory, two pointers	3000	x368
1411B	Fair Numbers brute force, number theory	1000	x19203
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x23259
1407B	Big Vova brute force, greedy, math, number theory	1300	x16987
1406E	Deleting Numbers interactive, math, number theory	2600	x1612
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x1073
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x9288
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x24209
1398G	Running Competition bitmasks, fft, math, number theory	2600	x1083
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14682
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x15412
1389E	Calendar Ambiguity math, number theory	2200	x3436
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x41011
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24897
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12638
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x265
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x27856
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2339
1371E1	Asterism (Easy Version) binary search, brute force, combinatorics, math, number theory, sortings	1900	x5224
1370C	Number Game games, math, number theory	1400	x24499
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23649
1370A	Maximum GCD greedy, implementation, math, number theory	800	x51736
1367E	Necklace Assembly brute force, dfs and similar, dp, graphs, greedy, number theory	1900	x5430
1366D	Two Divisors constructive algorithms, math, number theory	2000	x10458
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x27956
1360D	Buying Shovels math, number theory	1300	x32943
1359E	Modular Stability combinatorics, math, number theory	2000	x6099
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x857
1350B	Orac and Models dp, math, number theory	1400	x22054
1349A	Orac and LCM data structures, math, number theory	1600	x16983
1346G	Two IP Cameras *special problem, math, number theory	2300	x135
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15619
1342C	Yet Another Counting Problem math, number theory	1600	x14007
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2819
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x4251
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17562
1331B	Limericks *special problem, math, number theory		x6999
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3263
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x30239
1325E	Ehab's REAL Number Theory Problem brute force, dfs and similar, graphs, number theory, shortest paths	2600	x2055
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x12083
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x39868
1324A	Yet Another Tetris Problem implementation, number theory	900	x25911
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2419
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x16502
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25880
1310F	Bad Cryptography math, number theory	3400	x74
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x2644
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x14513
1295D	Same GCDs math, number theory	1800	x8863
1294C	Product of Three Numbers greedy, math, number theory	1300	x34545
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x810
1285F	Classical? binary search, combinatorics, number theory	2900	x1131
1285C	Fadi and LCM brute force, math, number theory	1400	x23321
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1869
1277B	Make Them Odd greedy, number theory	1200	x15154
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9685
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x926
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13687
1260C	Infinite Fence greedy, math, number theory	1700	x8229
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x607
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x3161
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x4642
1245A	Good ol' Numbers Coloring math, number theory	1000	x14174
1244C	The Football Season brute force, math, number theory	2000	x7584
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12560
1238A	Prime Subtraction math, number theory	900	x24219
1228C	Primes and Multiplication math, number theory	1700	x9015
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x543
1225D	Power Products hashing, math, number theory	1800	x7949
1223G	Wooden Raft binary search, math, number theory	3200	x250
1220D	Alex and Julian bitmasks, math, number theory	1900	x3886
1220B	Multiplication Table math, number theory	1300	x11592
1210C	Kamil and Making a Stream math, number theory, trees	2000	x3321
1209B	Koala and Lights implementation, math, number theory	1300	x8155
1208G	Polygons greedy, math, number theory	2800	x753
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1657
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2300	x1068
1200C	Round Corridor math, number theory	1400	x9852