Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
1453E	Dog Snacks binary search, dfs and similar, dp, greedy, trees	2300	x1958
1452E	Two Editorials brute force, dp, greedy, sortings, two pointers	2500	x1478
1452D	Radio Towers combinatorics, dp, math	1600	x7737
1451C	String Equality dp, greedy, hashing, implementation, strings	1400	x15160
1451B	Non-Substring Subsequence dp, greedy, implementation, strings	900	x18950
1450G	Communism bitmasks, dp, trees	3500	x226
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3374
1446B	Catching Cheaters dp, strings	1800	x7500
1444E	Finding the Vertex brute force, dfs and similar, dp, interactive, trees	3500	x129
1444D	Rectangular Polyline constructive algorithms, dp, geometry	2900	x533
1443B	Saving the City dp, greedy, math, sortings	1300	x15443
1442E	Black, White and Grey Tree binary search, constructive algorithms, dfs and similar, dp, greedy, trees	3000	x549
1442D	Sum data structures, divide and conquer, dp, greedy	2800	x1912
1442A	Extreme Subtraction constructive algorithms, dp, greedy	1800	x8528
1439D	INOI Final Contests combinatorics, dp, fft	3100	x336
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1158
1437E	Make It Increasing binary search, constructive algorithms, data structures, dp, implementation	2200	x3314
1437C	Chef Monocarp dp, flows, graph matchings, greedy, math, sortings	1800	x10051
1433F	Zero Remainder Sum dp	2100	x5807
1431J	Zero-XOR Array *special problem, dp	3400	x41
1431G	Number Deletion Game *special problem, dp, games, greedy	2100	x137
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x605
1430F	Realistic Gameplay dp, greedy	2600	x852
1428G2	Lucky Numbers (Hard Version) dp, greedy	3000	x599
1428G1	Lucky Numbers (Easy Version) dp, greedy	2900	x542
1428F	Fruit Sequences binary search, data structures, divide and conquer, dp, two pointers	2400	x2156
1427C	The Hard Work of Paparazzi dp	2000	x5456
1426F	Number of Subsequences combinatorics, dp, strings	2000	x5075
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x800
1425B	Blue and Red of Our Faculty! divide and conquer, dp	2600	x272
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x725
1422E	Minlexes dp, greedy, implementation, strings	2700	x725
1422C	Bargain combinatorics, dp, math	1700	x8058
1421E	Swedish Heroes brute force, dp, implementation	2700	x667
1420E	Battle Lemmings dp, greedy	2500	x838
1420C2	Pokémon Army (hard version) data structures, divide and conquer, dp, greedy, implementation	2100	x4479
1420C1	Pokémon Army (easy version) constructive algorithms, dp, greedy	1300	x16970
1418C	Mortal Kombat Tower dp, graphs, greedy, shortest paths	1500	x17971
1416E	Split binary search, data structures, dp, greedy	3200	x267
1416C	XOR Inverse bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees	2000	x4150
1415F	Cakes for Clones dp	2900	x398
1415C	Bouncing Ball brute force, dp, implementation	1400	x10620
1413C	Perform Easily binary search, brute force, dp, implementation, sortings, two pointers	1900	x5518
1409F	Subsequences of Length Two dp, strings	2100	x4256
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x7521
1408I	Bitwise Magic dp, math	3200	x163
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x917
1408D	Searchlights binary search, brute force, data structures, dp, implementation, sortings, two pointers	2000	x4149
1408C	Discrete Acceleration binary search, dp, implementation, math, two pointers	1500	x8604
1407E	Egor in the Republic of Dagestan constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths	2500	x1597
1407D	Discrete Centrifugal Jumps data structures, dp, graphs	2200	x4601
1406B	Maximum Product brute force, dp, greedy, implementation, sortings	1200	x21976
1404B	Tree Tag dfs and similar, dp, games, trees	1900	x7050
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x42
1402C	Star Trek *special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees	2600	x195
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x8825
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x884
1400F	x-prime Substrings brute force, dfs and similar, dp, string suffix structures, strings	2800	x761
1400E	Clear the Multiset data structures, divide and conquer, dp, greedy	2200	x4985
1399F	Yet Another Segments Subset data structures, dp, graphs, sortings	2300	x1541
1398F	Controversial Rounds binary search, data structures, dp, greedy, two pointers	2500	x1062
1398D	Colored Rectangles dp, greedy, sortings	1800	x10945
1398C	Good Subarrays data structures, dp, math	1600	x23944
1396C	Monster Invaders dp, greedy, implementation	2300	x2373
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x13466
1394D	Boboniu and Jianghu dp, greedy, sortings, trees	2800	x799
1394A	Boboniu Chats with Du dp, greedy, sortings, two pointers	1800	x6427
1393E2	Twilight and Ancient Scroll (harder version) dp, hashing, implementation, string suffix structures, strings, two pointers	3200	x343
1393E1	Twilight and Ancient Scroll (easier version) dp, hashing, implementation, string suffix structures, strings	2800	x366
1393D	Rarity and New Dress dfs and similar, dp, implementation, shortest paths	2100	x3763
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x665
1392G	Omkar and Pies bitmasks, dfs and similar, dp, math, shortest paths	2900	x438
1392D	Omkar and Bed Wars dp, greedy	1700	x8398
1391D	505 bitmasks, brute force, constructive algorithms, dp, greedy, implementation	2000	x4907
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14513
1389G	Directing Edges dfs and similar, dp, graphs, trees	2800	x379
1389F	Bicolored Segments data structures, dp, graph matchings, sortings	2600	x938
1389C	Good String brute force, dp, greedy, two pointers	1500	x18287
1389B	Array Walk brute force, dp, greedy	1600	x15704
1387C	Viruses *special problem, dp, shortest paths, string suffix structures	2900	x121
1387B1	Village (Minimum) *special problem, dp, greedy, trees	2100	x1293
1387A	Graph *special problem, binary search, dfs and similar, dp, math, ternary search	2100	x666
1385D	a-Good String bitmasks, brute force, divide and conquer, dp, implementation	1500	x18247
1384B2	Koa and the Beach (Hard Version) constructive algorithms, dp, greedy, implementation	2200	x2432
1384B1	Koa and the Beach (Easy Version) brute force, dp, greedy	1900	x3820
1383E	Strange Operation combinatorics, data structures, dp	2800	x743
1383C	String Transformation 2 bitmasks, dp, graphs, trees	3100	x555
1383B	GameGame bitmasks, constructive algorithms, dp, games, greedy, math	1900	x4734
1382B	Sequential Nim dp, games	1100	x23822
1381D	The Majestic Brown Tree Snake dfs and similar, dp, greedy, trees, two pointers	3000	x444
1381B	Unmerge dp	1800	x8470
1380F	Strange Addition data structures, dp, matrices	2600	x749
1380C	Create The Teams brute force, dp, greedy, implementation, sortings	1400	x19824
1379E	Inverse Genealogy constructive algorithms, divide and conquer, dp, math, trees	2800	x385
1379C	Choosing flowers binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers	2000	x5384
1373E	Sum of Digits brute force, constructive algorithms, dp, greedy	2200	x2687
1373D	Maximum Sum on Even Positions divide and conquer, dp, greedy, implementation	1600	x14890
1372E	Omkar and Last Floor dp, greedy, two pointers	2900	x959
1372D	Omkar and Circle brute force, dp, games, greedy	2100	x5281
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2290