Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1987D	World is Mine dp, games	1800	x4653
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4270
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5485
1974E	Money Buys Happiness dp	1800	x6718
1970E1	Trails (Easy) dp	1800	x1531
1968F	Equal XOR Segments binary search, data structures	1800	x4761
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5858
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6416
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5447
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1414
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5505
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7674
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7534
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3849
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6230
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7289
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x5730
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2176
1910D	Remove and Add *special problem, greedy	1800	x327
1907F	Shift and Reverse greedy, sortings	1800	x4579
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x4037
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5992
1870D	Prefix Purchase greedy, implementation, sortings	1800	x6610
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5521
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5884
1861D	Sorting By Multiplication dp, greedy	1800	x6452
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6707
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5036
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4264
1852A	Ntarsis' Set binary search, math, number theory	1800	x7758
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5514
1848C	Vika and Price Tags math, number theory	1800	x6109
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x2974
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x6749
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7510
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5103
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7474
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5110
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4417
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6084
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6262
1801B	Buying gifts data structures, greedy, sortings	1800	x5982
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x5912
1781D	Many Perfect Squares brute force, math, number theory	1800	x5357
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4762
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5970
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x372
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x6853
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3794
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7070
1750D	Count GCD combinatorics, math, number theory	1800	x5704
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4198
1734D	Slime Escape data structures, dp, greedy, two pointers	1800	x6146
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5689
1729E	Guess the Cycle Size interactive, probabilities	1800	x6851
1728D	Letter Picking constructive algorithms, dp, games, two pointers	1800	x6998
1725M	Moving Both Hands dp, graphs, shortest paths	1800	x2911
1725H	Hot Black Hot White constructive algorithms, math	1800	x2542
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6454
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5824
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x5596
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5543
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8643
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6196
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5616
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6472
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x5143
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x4942
1666L	Labyrinth dfs and similar, graphs	1800	x3016
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x3115
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6282
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7484
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6107
1630B	Range and Partition binary search, constructive algorithms, data structures, greedy, two pointers	1800	x5591
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6433
1619D	New Year's Problem binary search, greedy, sortings	1800	x7380
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4589
1611F	ATM and Students binary search, data structures, two pointers	1800	x6298
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5304
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5390
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2441
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x8689
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x326
1571C	Rhyme *special problem, implementation	1800	x371
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7778
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6690
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5708
1554D	Diane constructive algorithms, greedy, strings	1800	x9225
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8679
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6817
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5829
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9488
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7572
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x5888
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9510
1517D	Explorer Space dp, graphs, shortest paths	1800	x7450
1509C	The Sports Festival dp, greedy	1800	x12067
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3887
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1735
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x751

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