Problemset - Codeforces

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Codeforces Round (Div. 2)
4 days

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Problems

#	Name
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x2663
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x3053
1809D	Binary String Sorting constructive algorithms, greedy	1800	x4471
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x4368
1801B	Buying gifts data structures, greedy, sortings	1800	x4407
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x4624
1781D	Many Perfect Squares brute force, math, number theory	1800	x4385
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x3797
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x4462
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x328
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x5488
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x2936
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x5539
1750D	Count GCD combinatorics, math, number theory	1800	x4568
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x3422
1734D	Slime Escape data structures, dp, greedy, two pointers	1800	x5126
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x4517
1729E	Guess the Cycle Size interactive, probabilities	1800	x5873
1728D	Letter Picking constructive algorithms, dp, games, two pointers	1800	x5842
1725M	Moving Both Hands dp, graphs, shortest paths	1800	x2117
1725H	Hot Black Hot White constructive algorithms, math	1800	x2061
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x5308
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5017
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x4747
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5013
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x7604
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x5473
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x4625
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x5749
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x4163
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x4293
1666L	Labyrinth dfs and similar, graphs	1800	x2595
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x2697
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x5486
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x6566
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5299
1630B	Range and Partition binary search, constructive algorithms, data structures, greedy, two pointers	1800	x4947
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x5697
1619D	New Year's Problem binary search, greedy, sortings	1800	x6319
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4135
1611F	ATM and Students binary search, data structures, two pointers	1800	x5345
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x4896
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x4377
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2066
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x7454
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x285
1571C	Rhyme *special problem, implementation	1800	x330
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x6928
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x5497
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5331
1554D	Diane constructive algorithms, greedy, strings	1800	x8130
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x7724
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6081
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5475
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x8096
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x6810
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x5250
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x8275
1517D	Explorer Space dp, graphs, shortest paths	1800	x6622
1509C	The Sports Festival dp, greedy	1800	x10254
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3524
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1635
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x676
1500A	Going Home brute force, hashing, implementation, math	1800	x7971
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6309
1488B	RBS Deletion *special problem, greedy	1800	x492
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x5303
1475D	Cleaning the Phone binary search, dp, sortings, two pointers	1800	x8683
1468J	Road Reform dsu, graphs, greedy	1800	x3278
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6376
1463C	Busy Robot implementation	1800	x5101
1462F	The Treasure of The Segments binary search, data structures, greedy	1800	x5956
1450D	Rating Compression binary search, data structures, greedy, implementation, two pointers	1800	x4983
1446B	Catching Cheaters dp, strings	1800	x6904
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4017
1442A	Extreme Subtraction constructive algorithms, dp, greedy	1800	x7869
1437C	Chef Monocarp dp, flows, graph matchings, greedy, math, sortings	1800	x9156
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x6684
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x6659
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x6973
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x1006
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x8124
1398D	Colored Rectangles dp, greedy, sortings	1800	x10167
1396B	Stoned Game brute force, constructive algorithms, games, greedy	1800	x9878
1394A	Boboniu Chats with Du dp, greedy, sortings, two pointers	1800	x6041
1388C	Uncle Bogdan and Country Happiness dfs and similar, greedy, math, trees	1800	x8769
1381B	Unmerge dp	1800	x7880
1367D	Task On The Board constructive algorithms, greedy, implementation, sortings	1800	x7570
1355C	Count Triangles binary search, implementation, math, two pointers	1800	x9551
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x7513
1335E2	Three Blocks Palindrome (hard version) brute force, data structures, dp, two pointers	1800	x7390
1334D	Minimum Euler Cycle constructive algorithms, graphs, greedy, implementation	1800	x6670
1329A	Dreamoon Likes Coloring constructive algorithms, greedy, implementation, math	1800	x8349
1328D	Carousel constructive algorithms, dp, graphs, greedy, math	1800	x11494
1327E	Count The Blocks combinatorics, dp, math	1800	x7945
1326D2	Prefix-Suffix Palindrome (Hard version) binary search, greedy, hashing, string suffix structures, strings	1800	x8646
1324F	Maximum White Subtree dfs and similar, dp, graphs, trees	1800	x7428
1316C	Primitive Primes constructive algorithms, math, ternary search	1800	x6691
1304D	Shortest and Longest LIS constructive algorithms, graphs, greedy, two pointers	1800	x5733
1299B	Aerodynamic geometry	1800	x4831

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