Problemset - Codeforces

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Codeforces Round 978 (Div. 2)
6 days

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Problems

#	Name
1386B	Mixture *special problem, data structures, geometry, math, sortings	2900	x122
1386A	Colors *special problem, binary search, constructive algorithms, interactive	2700	x263
1385G	Columns Swaps 2-sat, dfs and similar, dsu, graphs, implementation	2300	x1556
1385F	Removing Leaves data structures, greedy, implementation, trees	2300	x2541
1385E	Directing Edges constructive algorithms, dfs and similar, graphs	2000	x7454
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x19314
1385C	Make It Good greedy	1200	x26990
1385B	Restore the Permutation by Merger greedy	800	x37152
1385A	Three Pairwise Maximums math	800	x39122
1384B2	Koa and the Beach (Hard Version) constructive algorithms, dp, greedy, implementation	2200	x2497
1384B1	Koa and the Beach (Easy Version) brute force, dp, greedy	1900	x3902
1384A	Common Prefixes constructive algorithms, greedy, strings	1200	x18790
1383F	Special Edges flows, graphs	3200	x359
1383E	Strange Operation combinatorics, data structures, dp	2800	x786
1383D	Rearrange brute force, constructive algorithms, graphs, greedy, sortings	2800	x685
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x576
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x5056
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x10657
1382B	Sequential Nim dp, games	1100	x24667
1382A	Common Subsequence brute force	800	x26511
1381E	Origami geometry, math, sortings	3300	x267
1381D	The Majestic Brown Tree Snake dfs and similar, dp, greedy, trees, two pointers	3000	x675
1381C	Mastermind constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers	2500	x1633
1381B	Unmerge dp	1800	x8907
1381A2	Prefix Flip (Hard Version) constructive algorithms, data structures, implementation, strings, two pointers	1700	x13295
1381A1	Prefix Flip (Easy Version) constructive algorithms, data structures, strings	1300	x20501
1380G	Circular Dungeon greedy, math, probabilities	2600	x797
1380F	Strange Addition data structures, dp, matrices	2600	x784
1380E	Merging Towers data structures, dsu, implementation, trees	2300	x2182
1380D	Berserk And Fireball constructive algorithms, greedy, implementation, math, two pointers	2000	x4693
1380C	Create The Teams brute force, dp, greedy, implementation, sortings	1400	x20734
1380B	Universal Solution greedy	1400	x14607
1380A	Three Indices brute force, data structures	900	x25776
1379F2	Chess Strikes Back (hard version) data structures, divide and conquer	2800	x507
1379F1	Chess Strikes Back (easy version) binary search, data structures	2700	x598
1379E	Inverse Genealogy constructive algorithms, divide and conquer, dp, math, trees	2800	x430
1379D	New Passenger Trams binary search, brute force, data structures, sortings, two pointers	2300	x1085
1379C	Choosing flowers binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers	2000	x5571
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12669
1379A	Acacius and String brute force, implementation, strings	1500	x11929
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x265
1375H	Set Merging constructive algorithms, divide and conquer	3300	x417
1375G	Tree Modification brute force, constructive algorithms, dfs and similar, graph matchings, graphs, trees	2800	x1927
1375F	Integer Game constructive algorithms, games, interactive, math	2600	x2243
1375E	Inversion SwapSort constructive algorithms, greedy, sortings	2500	x3063
1375D	Replace by MEX brute force, constructive algorithms, sortings	1900	x9188
1375C	Element Extermination constructive algorithms, data structures, greedy	1400	x21157
1375B	Neighbor Grid constructive algorithms, greedy	1200	x17282
1375A	Sign Flipping constructive algorithms, math	1100	x18346
1374F	Cyclic Shifts Sorting brute force, constructive algorithms, implementation, sortings	2400	x1297
1374E2	Reading Books (hard version) data structures, greedy, implementation, sortings, ternary search, two pointers	2500	x927
1374E1	Reading Books (easy version) data structures, greedy, sortings	1600	x14041
1374D	Zero Remainder Array math, sortings, two pointers	1400	x23784
1374C	Move Brackets greedy, strings	1000	x46888
1374B	Multiply by 2, divide by 6 math	900	x50299
1374A	Required Remainder math	800	x53787
1373G	Pawns data structures, divide and conquer, greedy	2600	x794
1373F	Network Coverage binary search, constructive algorithms, data structures, greedy	2400	x1663
1373E	Sum of Digits brute force, constructive algorithms, dp, greedy	2200	x2741
1373D	Maximum Sum on Even Positions divide and conquer, dp, greedy, implementation	1600	x15620
1373C	Pluses and Minuses math	1300	x18358
1373B	01 Game games	900	x35816
1373A	Donut Shops greedy, implementation, math	1000	x27017
1372F	Omkar and Modes binary search, divide and conquer, interactive	2700	x446
1372E	Omkar and Last Floor dp, greedy, two pointers	2900	x1187
1372D	Omkar and Circle brute force, dp, games, greedy	2100	x5394
1372C	Omkar and Baseball constructive algorithms, math	1500	x17843
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x28059
1372A	Omkar and Completion constructive algorithms, implementation	800	x31930
1371F	Raging Thunder data structures, divide and conquer, implementation	2800	x616
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2349
1371E1	Asterism (Easy Version) binary search, brute force, combinatorics, math, number theory, sortings	1900	x5237
1371D	Grid-00100 constructive algorithms, greedy, implementation	1600	x12991
1371C	A Cookie for You greedy, implementation, math	1300	x20542
1371B	Magical Calendar math	1200	x19173
1371A	Magical Sticks math	800	x46051
1370F2	The Hidden Pair (Hard Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2700	x1483
1370F1	The Hidden Pair (Easy Version) binary search, dfs and similar, graphs, interactive, shortest paths, trees	2400	x1601
1370E	Binary Subsequence Rotation binary search, constructive algorithms, data structures, greedy	2100	x4882
1370D	Odd-Even Subsequence binary search, dp, dsu, greedy, implementation	2000	x9658
1370C	Number Game games, math, number theory	1400	x24590
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23688
1370A	Maximum GCD greedy, implementation, math, number theory	800	x52086
1369F	BareLee dfs and similar, dp, games	2700	x649
1369E	DeadLee data structures, dfs and similar, greedy, implementation, sortings	2400	x2248
1369D	TediousLee dp, graphs, greedy, math, trees	1900	x8620
1369C	RationalLee greedy, math, sortings, two pointers	1400	x19592
1369B	AccurateLee greedy, implementation, strings	1200	x24426
1369A	FashionabLee geometry, math	800	x36539
1368H2	Breadboard Capacity (hard version)	3500	x226
1368H1	Breadboard Capacity (easy version) dp, flows, greedy	3300	x349
1368G	Shifting Dominoes data structures, geometry, graphs, trees	3200	x592
1368F	Lamps on a Circle games, implementation, interactive, math	2600	x1043
1368E	Ski Accidents constructive algorithms, graphs, greedy	2500	x2215
1368D	AND, OR and square sum bitmasks, greedy, math	1700	x11815
1368C	Even Picture constructive algorithms	1500	x13390
1368B	Codeforces Subsequences brute force, constructive algorithms, greedy, math, strings	1500	x19759
1368A	C+= brute force, greedy, implementation, math	800	x39298
1367F2	Flying Sort (Hard Version) binary search, data structures, dp, greedy, sortings, two pointers	2400	x1666
1367F1	Flying Sort (Easy Version) dp, greedy, two pointers	2100	x3263