Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 945 (Div. 2)
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

strings

Add tag

Problems

#	Name
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x818
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1954
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x968
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2602
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x41859
1759A	Yes-Yes? implementation, strings	800	x28828
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x24394
1750F	Majority combinatorics, dp, math, strings	2700	x861
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1361
1748B	Diverse Substrings brute force, implementation, strings	1400	x14246
1742F	Smaller constructive algorithms, greedy, strings	1500	x10845
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x29870
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x513
1738H	Palindrome Addicts data structures, strings	3300	x227
1737A	Ela Sorting Books greedy, implementation, strings	900	x9958
1736D	Equal Binary Subsequences constructive algorithms, geometry, greedy, implementation, strings	2200	x2402
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9586
1730D	Prefixes and Suffixes constructive algorithms, strings, two pointers	2200	x2598
1729G	Cut Substrings combinatorics, dp, hashing, strings, two pointers	2100	x2062
1729C	Jumping on Tiles constructive algorithms, strings	1100	x19453
1729B	Decode String greedy, strings	800	x29417
1721E	Prefix Function Queries dfs and similar, dp, hashing, string suffix structures, strings, trees	2200	x1816
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1731
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5732
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x8722
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8518
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x22573
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x98
1703D	Double Strings brute force, data structures, strings	1100	x24410
1703C	Cypher brute force, implementation, strings	800	x34233
1703A	YES or YES? brute force, implementation, strings	800	x63002
1701E	Text Editor brute force, dp, greedy, strings	2500	x1058
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x13957
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15113
1690F	Shifting String graphs, math, number theory, strings	1700	x6820
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x7906
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3168
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x23485
1682A	Palindromic Indices greedy, strings	800	x19027
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9514
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1100
1676C	Most Similar Words brute force, greedy, implementation, implementation, math, strings	800	x28860
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10125
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22937
1673B	A Perfectly Balanced String? brute force, greedy, strings	1100	x14306
1673A	Subtle Substring Subtraction games, greedy, strings	800	x18228
1670B	Dorms War brute force, implementation, strings	1100	x12419
1669E	2-Letter Strings data structures, math, strings	1200	x16938
1663G	Six Characters *special problem, constructive algorithms, strings		x204
1663F	In Every Generation... *special problem, strings		x328
1662D	Evolution of Weasels greedy, implementation, strings		x1689
1662B	Toys greedy, strings		x131
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2604
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x7003
1660C	Get an Even String dp, greedy, strings	1300	x18791
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10632
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x1054
1654B	Prefix Removals strings	800	x15478
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x33916
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x6005
1634A	Reverse and Concatenate greedy, strings	800	x23651
1628B	Peculiar Movie Preferences greedy, strings	1700	x11198
1626B	Minor Reduction greedy, strings	1100	x22347
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x3953
1624D	Palindromes Coloring binary search, greedy, sortings, strings	1400	x16282
1623E	Middle Duplication data structures, dfs and similar, greedy, strings, trees	2500	x1077
1619A	Square String? implementation, strings	800	x48613
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4037
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16094
1616E	Lexicographically Small Enough brute force, data structures, greedy, strings	2200	x2385
1616B	Mirror in the String greedy, strings	1100	x19103
1609B	William the Vigilant implementation, strings	1100	x11507
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x150
1607A	Linear Keyboard implementation, strings	800	x36118
1606A	AB Balance strings	900	x22875
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x16352
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x324
1594C	Make Them Equal brute force, greedy, math, strings	1200	x17957
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x846
1582C	Grandma Capa Knits a Scarf brute force, data structures, greedy, strings, two pointers	1200	x14442
1579A	Casimir's String Solitaire math, strings	800	x37838
1578H	Higher Order Functions implementation, strings	1700	x1990
1575H	Holiday Wall Ornaments dp, strings	2200	x578
1575A	Another Sorting Problem data structures, sortings, strings	1100	x4225
1567A	Domino Disaster implementation, strings	800	x29659
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1329
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7666
1560D	Make a Power of Two greedy, math, strings	1300	x17661
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x11764
1554D	Diane constructive algorithms, greedy, strings	1800	x9087
1553D	Backspace dp, greedy, strings, two pointers	1500	x13351
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x13833
1552A	Subsequence Permutation sortings, strings	800	x23521
1551C	Interesting Story greedy, sortings, strings	1500	x12897
1551B1	Wonderful Coloring - 1 greedy, strings	800	x28656
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1441
1547B	Alphabetical Strings greedy, implementation, strings	800	x25978
1539B	Love Song dp, implementation, strings	800	x23798
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x2806
1537E2	Erase and Extend (Hard Version) binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers	2200	x4988