Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1795A	Two Towers brute force, implementation, strings	800	x23429
1794A	Prefix and Suffix Array strings	800	x16892
1791D	Distinct Split brute force, greedy, strings	1000	x28315
1791A	Codeforces Checking implementation, strings	800	x57463
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x36305
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x540
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15968
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7319
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x23000
1778C	Flexible String bitmasks, brute force, strings	1600	x7915
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x854
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1981
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x1029
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2658
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x43011
1759A	Yes-Yes? implementation, strings	800	x29403
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x24905
1750F	Majority combinatorics, dp, math, strings	2700	x880
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1379
1748B	Diverse Substrings brute force, implementation, strings	1400	x14758
1742F	Smaller constructive algorithms, greedy, strings	1500	x11213
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x30289
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	x10021
1736D	Equal Binary Subsequences constructive algorithms, geometry, greedy, implementation, strings	2200	x2427
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9716
1730D	Prefixes and Suffixes constructive algorithms, strings, two pointers	2200	x2624
1729G	Cut Substrings combinatorics, dp, hashing, strings, two pointers	2100	x2110
1729C	Jumping on Tiles constructive algorithms, strings	1100	x19673
1729B	Decode String greedy, strings	800	x29731
1721E	Prefix Function Queries dfs and similar, dp, hashing, string suffix structures, strings, trees	2200	x1864
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1778
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5837
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x8886
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8657
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x22695
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x99
1703D	Double Strings brute force, data structures, strings	1100	x24934
1703C	Cypher brute force, implementation, strings	800	x34792
1703A	YES or YES? brute force, implementation, strings	800	x65556
1701E	Text Editor brute force, dp, greedy, strings	2500	x1089
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14119
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15315
1690F	Shifting String graphs, math, number theory, strings	1700	x6959
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8022
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3213
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x23665
1682A	Palindromic Indices greedy, strings	800	x19150
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9714
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1122
1676C	Most Similar Words brute force, greedy, implementation, implementation, math, strings	800	x29392
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10394
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x23213
1673B	A Perfectly Balanced String? brute force, greedy, strings	1100	x14697
1673A	Subtle Substring Subtraction games, greedy, strings	800	x18330
1670B	Dorms War brute force, implementation, strings	1100	x12529
1669E	2-Letter Strings data structures, math, strings	1200	x17342
1663G	Six Characters *special problem, constructive algorithms, strings		x207
1663F	In Every Generation... *special problem, strings		x333
1662D	Evolution of Weasels greedy, implementation, strings		x1715
1662B	Toys greedy, strings		x132
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2648
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7117
1660C	Get an Even String dp, greedy, strings	1300	x19150
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10761
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1089
1654B	Prefix Removals strings	800	x15540
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x34275
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6119
1634A	Reverse and Concatenate greedy, strings	800	x23756
1628B	Peculiar Movie Preferences greedy, strings	1700	x11359
1626B	Minor Reduction greedy, strings	1100	x22555
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x4015
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x16592
1623E	Middle Duplication data structures, dfs and similar, greedy, strings, trees	2500	x1081
1619A	Square String? implementation, strings	800	x49840
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4110
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16180
1616E	Lexicographically Small Enough brute force, data structures, greedy, strings	2200	x2453
1616B	Mirror in the String greedy, strings	1100	x19291
1609B	William the Vigilant implementation, strings	1100	x11603
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x152
1607A	Linear Keyboard implementation, strings	800	x36587
1606A	AB Balance strings	900	x23592
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x16605
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x328
1594C	Make Them Equal brute force, greedy, math, strings	1200	x18608
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x902
1582C	Grandma Capa Knits a Scarf brute force, data structures, greedy, strings, two pointers	1200	x14979
1579A	Casimir's String Solitaire math, strings	800	x38295
1578H	Higher Order Functions implementation, strings	1700	x2003
1575H	Holiday Wall Ornaments dp, strings	2200	x595
1575A	Another Sorting Problem data structures, sortings, strings	1100	x4294
1567A	Domino Disaster implementation, strings	800	x29853
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1353
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7819
1560D	Make a Power of Two greedy, math, strings	1300	x17902
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x12047
1554D	Diane constructive algorithms, greedy, strings	1800	x9239