Problemset - Codeforces

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Codeforces Round #630 (Div. 2)
2 days
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number theory

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Problems

#	Name
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x1756
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x13304
1325E	Ehab's REAL Number Theory Problem brute force, dfs and similar, graphs, number theory, shortest paths	2700	x935
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x5639
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x14677
1324A	Yet Another Tetris Problem implementation, number theory	1000	x13561
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x7714
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x12871
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x923
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x982
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x6274
1310F	Bad Cryptography math, number theory	3300	x25
1295D	Same GCDs math, number theory	1800	x4142
1294C	Product of Three Numbers greedy, math, number theory	1300	x11838
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x435
1285F	Classical? binary search, combinatorics, number theory	2800	x358
1285C	Fadi and LCM brute force, math, number theory	1400	x8893
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x465
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x5581
1277B	Make Them Odd greedy, number theory	1200	x6523
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3600	x65
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x6618
1260C	Infinite Fence greedy, math, number theory	1700	x4349
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x1669
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2000	x2423
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2700	x292
1242A	Tile Painting constructive algorithms, math, number theory	1500	x7179
1245A	Good ol' Numbers Coloring math, number theory	1000	x9305
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3000	x147
1225D	Power Products hashing, math, number theory	1900	x3396
1244C	The Football Season brute force, math, number theory	1900	x4437
1238A	Prime Subtraction math, number theory	900	x12491
1223G	Wooden Raft binary search, math, number theory	3100	x109
1228C	Primes and Multiplication math, number theory	1600	x5406
1210C	Kamil and Making a Stream math, number theory, trees	2100	x2051
1220D	Alex and Julian bitmasks, math, number theory	1900	x2423
1220B	Multiplication Table math, number theory	1300	x7133
1209B	Koala and Lights implementation, math, number theory	1300	x5811
1208G	Polygons greedy, math, number theory	2700	x384
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2400	x832
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2500	x579
1200C	Round Corridor math, number theory	1500	x6475
1198F	GCD Groups 2 greedy, number theory, probabilities	2900	x283
1195D2	Submarine in the Rybinsk Sea (hard edition) combinatorics, math, number theory	1700	x3119
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x5439
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1600	x4374
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2500	x463
1190F	Tokitsukaze and Powers number theory, probabilities	3300	x40
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x46
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x710
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x3161
1188B	Count Pairs math, matrices, number theory, two pointers	2200	x2480
1182F	Maximum Sine binary search, data structures, number theory	2900	x167
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2200	x1413
1176D	Recover it! dfs and similar, graphs, greedy, number theory, sortings	1900	x2773
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x677
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x7192
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3100	x92
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2000	x1730
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x7641
1165D	Almost All Divisors math, number theory	1600	x6009
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1300	x8020
1152C	Neko does Maths brute force, math, number theory	1800	x3698
1155C	Alarm Clocks Everywhere math, number theory	1300	x6007
1146D	Frog Jumping dfs and similar, math, number theory	2100	x792
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2400	x1416
1144E	Median String bitmasks, math, number theory, strings	1900	x2547
1143B	Nirvana brute force, math, number theory	1300	x6161
1139D	Steps to One dp, math, number theory, probabilities	2300	x864
1137D	Cooperative Game constructive algorithms, interactive, number theory	2500	x623
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x5230
1133B	Preparation for International Women's Day math, number theory	1300	x7019
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x5374
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x245
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2500	x892
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2100	x1764
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x4995
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x5623
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x515
1107D	Compression dp, implementation, math, number theory	1800	x2632
1107B	Digital root math, number theory	1100	x8156
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x11633
1103E	Radix sum fft, math, number theory	3300	x82
1101D	GCD Counting data structures, dfs and similar, dp, number theory, trees	2000	x2140
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x74
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2400	x699
1097D	Makoto and a Blackboard dp, math, number theory, probabilities	2200	x1724
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3100	x102
1091C	New Year and the Sphere Transmission math, number theory	1400	x6685
1081E	Missing Numbers binary search, constructive algorithms, greedy, math, number theory	1900	x1624
1056B	Divide Candies math, number theory	1600	x2782
1061C	Multiplicity data structures, dp, implementation, math, number theory	1700	x3543
1062B	Math greedy, math, number theory	1600	x4645
1076B	Divisor Subtraction implementation, math, number theory	1200	x7183
1055C	Lucky Days math, number theory	1900	x1364
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x948
1068B	LCM math, number theory	1200	x5865
1070A	Find a Number dp, graphs, number theory, shortest paths	2200	x1426
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3400	x69
1033D	Divisors interactive, math, number theory	2000	x1468

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