Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1794A	Prefix and Suffix Array strings	800	x16836
1791D	Distinct Split brute force, greedy, strings	1000	x28104
1791A	Codeforces Checking implementation, strings	800	x57110
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x36186
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x528
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15940
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7264
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x22976
1778C	Flexible String bitmasks, brute force, strings	1600	x7879
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x843
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1977
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x999
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2642
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x42790
1759A	Yes-Yes? implementation, strings	800	x29273
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x24872
1750F	Majority combinatorics, dp, math, strings	2700	x872
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1374
1748B	Diverse Substrings brute force, implementation, strings	1400	x14698
1742F	Smaller constructive algorithms, greedy, strings	1500	x11143
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x30224
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x517
1738H	Palindrome Addicts data structures, strings	3300	x232
1737A	Ela Sorting Books greedy, implementation, strings	900	x10015
1736D	Equal Binary Subsequences constructive algorithms, geometry, greedy, implementation, strings	2200	x2421
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9686
1730D	Prefixes and Suffixes constructive algorithms, strings, two pointers	2200	x2614
1729G	Cut Substrings combinatorics, dp, hashing, strings, two pointers	2100	x2100
1729C	Jumping on Tiles constructive algorithms, strings	1100	x19622
1729B	Decode String greedy, strings	800	x29655
1721E	Prefix Function Queries dfs and similar, dp, hashing, string suffix structures, strings, trees	2200	x1846
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1772
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5818
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x8857
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8639
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x22664
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x99
1703D	Double Strings brute force, data structures, strings	1100	x24857
1703C	Cypher brute force, implementation, strings	800	x34695
1703A	YES or YES? brute force, implementation, strings	800	x65158
1701E	Text Editor brute force, dp, greedy, strings	2500	x1086
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14090
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15281
1690F	Shifting String graphs, math, number theory, strings	1700	x6936
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8005
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3208
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x23642
1682A	Palindromic Indices greedy, strings	800	x19125
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9671
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1117
1676C	Most Similar Words brute force, greedy, implementation, implementation, math, strings	800	x29288
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10340
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x23153
1673B	A Perfectly Balanced String? brute force, greedy, strings	1100	x14622
1673A	Subtle Substring Subtraction games, greedy, strings	800	x18299
1670B	Dorms War brute force, implementation, strings	1100	x12497
1669E	2-Letter Strings data structures, math, strings	1200	x17277
1663G	Six Characters *special problem, constructive algorithms, strings		x207
1663F	In Every Generation... *special problem, strings		x333
1662D	Evolution of Weasels greedy, implementation, strings		x1706
1662B	Toys greedy, strings		x132
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2635
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7094
1660C	Get an Even String dp, greedy, strings	1300	x19070
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10737
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1072
1654B	Prefix Removals strings	800	x15533
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x34227
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6105
1634A	Reverse and Concatenate greedy, strings	800	x23737
1628B	Peculiar Movie Preferences greedy, strings	1700	x11333
1626B	Minor Reduction greedy, strings	1100	x22505
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x4005
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x16559
1623E	Middle Duplication data structures, dfs and similar, greedy, strings, trees	2500	x1081
1619A	Square String? implementation, strings	800	x49639
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4095
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16167
1616E	Lexicographically Small Enough brute force, data structures, greedy, strings	2200	x2409
1616B	Mirror in the String greedy, strings	1100	x19252
1609B	William the Vigilant implementation, strings	1100	x11594
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x151
1607A	Linear Keyboard implementation, strings	800	x36509
1606A	AB Balance strings	900	x23460
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x16570
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x326
1594C	Make Them Equal brute force, greedy, math, strings	1200	x18500
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x893
1582C	Grandma Capa Knits a Scarf brute force, data structures, greedy, strings, two pointers	1200	x14884
1579A	Casimir's String Solitaire math, strings	800	x38212
1578H	Higher Order Functions implementation, strings	1700	x2002
1575H	Holiday Wall Ornaments dp, strings	2200	x593
1575A	Another Sorting Problem data structures, sortings, strings	1100	x4285
1567A	Domino Disaster implementation, strings	800	x29819
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1351
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7772
1560D	Make a Power of Two greedy, math, strings	1300	x17851
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x11983
1554D	Diane constructive algorithms, greedy, strings	1800	x9222
1553D	Backspace dp, greedy, strings, two pointers	1500	x13472