Problemset - Codeforces

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Codeforces Round #851 (Div. 2)
37:24:05
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strings

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Problems

#	Name
1791D	Distinct Split brute force, greedy, strings	1000	x15050
1791A	Codeforces Checking implementation, strings	800	x28925
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x25231
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x4994
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x20517
1778C	Flexible String bitmasks, brute force, strings		x4928
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees		x472
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x584
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x1903
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x29984
1759A	Yes-Yes? implementation, strings	800	x22428
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x20429
1750F	Majority combinatorics, dp, math, strings	2700	x479
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1090
1748B	Diverse Substrings brute force, implementation, strings	1400	x11190
1742F	Smaller constructive algorithms, greedy, strings	1500	x7648
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x24941
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x378
1738H	Palindrome Addicts data structures, strings	3300	x146
1737A	Ela Sorting Books greedy, implementation, strings	900	x8860
1736D	Equal Binary Subsequences constructive algorithms, geometry, greedy, implementation, strings	2200	x1992
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x7884
1730D	Prefixes and Suffixes constructive algorithms, strings, two pointers	2200	x2222
1729G	Cut Substrings combinatorics, dp, hashing, strings, two pointers	2100	x1669
1729C	Jumping on Tiles constructive algorithms, strings	1100	x16268
1729B	Decode String greedy, strings	800	x25347
1721E	Prefix Function Queries dfs and similar, dp, hashing, string suffix structures, strings, trees	2200	x1448
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1422
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x4756
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x6917
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x7278
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x21011
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x70
1703D	Double Strings brute force, data structures, strings	1100	x19220
1703C	Cypher brute force, implementation, strings	800	x28348
1703A	YES or YES? brute force, implementation, strings	800	x40343
1701E	Text Editor brute force, dp, greedy, strings	2500	x930
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x11819
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x12938
1690F	Shifting String graphs, math, number theory, strings	1700	x5539
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x6900
1685B	Linguistics greedy, implementation, sortings, strings	2000	x2707
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x21586
1682A	Palindromic Indices greedy, strings	800	x17897
1680C	Binary String binary search, greedy, strings, two pointers	1600	x7768
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x909
1676C	Most Similar Words brute force, greedy, implementation, implementation, math, strings	800	x24042
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x8177
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x19533
1673B	A Perfectly Balanced String? brute force, greedy, strings	1100	x12780
1673A	Subtle Substring Subtraction games, greedy, strings	800	x17297
1670B	Dorms War brute force, implementation, strings	1100	x11245
1669E	2-Letter Strings data structures, math, strings	1200	x13343
1663G	Six Characters *special problem, constructive algorithms, strings		x161
1663F	In Every Generation... *special problem, strings		x276
1662D	Evolution of Weasels greedy, implementation, strings		x1208
1662B	Toys greedy, strings		x113
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2197
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x6013
1660C	Get an Even String dp, greedy, strings	1300	x15847
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x9230
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x789
1654B	Prefix Removals strings	800	x14776
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x30066
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5065
1634A	Reverse and Concatenate greedy, strings	800	x22377
1628B	Peculiar Movie Preferences greedy, strings	1700	x9720
1626B	Minor Reduction greedy, strings	1100	x19900
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x3334
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x13478
1623E	Middle Duplication data structures, dfs and similar, greedy, strings, trees	2500	x930
1619A	Square String? implementation, strings	800	x36810
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x3455
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x15236
1616E	Lexicographically Small Enough brute force, data structures, greedy, strings	2200	x2153
1616B	Mirror in the String greedy, strings	1100	x17205
1609B	William the Vigilant implementation, strings	1100	x10767
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x103
1607A	Linear Keyboard implementation, strings	800	x31427
1606A	AB Balance strings	900	x19235
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x13584
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x199
1594C	Make Them Equal brute force, greedy, math, strings	1200	x14836
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x691
1582C	Grandma Capa Knits a Scarf brute force, data structures, greedy, strings, two pointers	1200	x12204
1579A	Casimir's String Solitaire math, strings	800	x32924
1578H	Higher Order Functions implementation, strings	1700	x1760
1575H	Holiday Wall Ornaments dp, strings	2200	x476
1575A	Another Sorting Problem data structures, sortings, strings	1100	x3428
1567A	Domino Disaster implementation, strings	800	x26806
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1179
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x6698
1560D	Make a Power of Two greedy, math, strings	1300	x15572
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x9958
1554D	Diane constructive algorithms, greedy, strings	1800	x7794
1553D	Backspace dp, greedy, strings, two pointers	1500	x11520
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x12346
1552A	Subsequence Permutation sortings, strings	800	x21868
1551C	Interesting Story greedy, sortings, strings	1500	x11186
1551B1	Wonderful Coloring - 1 greedy, strings	800	x26179

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