Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4210
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5435
1974E	Money Buys Happiness dp	1800	x6672
1970E1	Trails (Easy) dp	1800	x1500
1968F	Equal XOR Segments binary search, data structures	1800	x4734
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x5835
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6392
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5423
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1407
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5489
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7661
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7512
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3841
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x6211
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7283
1915G	Bicycles graphs, greedy, implementation, shortest paths, sortings	1800	x5710
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x2169
1910D	Remove and Add *special problem, greedy	1800	x327
1907F	Shift and Reverse greedy, sortings	1800	x4574
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x4028
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5988
1870D	Prefix Purchase greedy, implementation, sortings	1800	x6607
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5515
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5874
1861D	Sorting By Multiplication dp, greedy	1800	x6445
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6700
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5033
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4262
1852A	Ntarsis' Set binary search, math, number theory	1800	x7753
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5507
1848C	Vika and Price Tags math, number theory	1800	x6100
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x2971
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x6742
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7497
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5096
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7466
1833G	Ksyusha and Chinchilla constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees	1800	x5100
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4407
1809D	Binary String Sorting constructive algorithms, greedy	1800	x6075
1805D	A Wide, Wide Graph dfs and similar, dp, graphs, greedy, trees	1800	x6249
1801B	Buying gifts data structures, greedy, sortings	1800	x5977
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x5902
1781D	Many Perfect Squares brute force, math, number theory	1800	x5355
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4756
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5961
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x372
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x6847
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3790
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7038
1750D	Count GCD combinatorics, math, number theory	1800	x5696
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4192
1734D	Slime Escape data structures, dp, greedy, two pointers	1800	x6144
1732C1	Sheikh (Easy version) binary search, bitmasks, greedy, two pointers	1800	x5681
1729E	Guess the Cycle Size interactive, probabilities	1800	x6844
1728D	Letter Picking constructive algorithms, dp, games, two pointers	1800	x6984
1725M	Moving Both Hands dp, graphs, shortest paths	1800	x2907
1725H	Hot Black Hot White constructive algorithms, math	1800	x2539
1721D	Maximum AND bitmasks, dfs and similar, divide and conquer, greedy, sortings	1800	x6444
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5818
1718A1	Burenka and Traditions (easy version) dp, greedy	1800	x5587
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5542
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8639
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6192
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5606
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6467
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x5137
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x4940
1666L	Labyrinth dfs and similar, graphs	1800	x3010
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x3110
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x6279
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7482
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6104
1630B	Range and Partition binary search, constructive algorithms, data structures, greedy, two pointers	1800	x5586
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6430
1619D	New Year's Problem binary search, greedy, sortings	1800	x7377
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4587
1611F	ATM and Students binary search, data structures, two pointers	1800	x6294
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5302
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5385
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2439
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x8683
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	x7772
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6682
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5706
1554D	Diane constructive algorithms, greedy, strings	1800	x9222
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8675
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6801
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5827
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9484
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7567
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x5888
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9506
1517D	Explorer Space dp, graphs, shortest paths	1800	x7445
1509C	The Sports Festival dp, greedy	1800	x12049
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3883
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1735
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x749
1500A	Going Home brute force, hashing, implementation, math	1800	x8632

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