Problemset - Codeforces

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Codeforces Round (Div. 2)
3 days

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Difficulty: —

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Problems

#	Name
1833A	Musical Puzzle implementation, strings	800	x24673
1832A	New Palindrome strings	800	x19117
1829A	Love Story implementation, strings	800	x28154
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x659
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x15271
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x2694
1822E	Making Anti-Palindromes greedy, math, strings	1600	x6425
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x1551
1821C	Tear It Apart brute force, implementation, math, strings	1300	x9816
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x10051
1820A	Yura's New Name implementation, strings	800	x13528
1817F	Entangled Substrings string suffix structures, strings	3500	x86
1815E	Bosco and Particle dp, math, number theory, strings	3100	x171
1811A	Insert Digit greedy, math, strings	800	x24369
1807C	Find and Replace greedy, implementation, strings	800	x23924
1805B	The String Has a Target greedy, strings	800	x16025
1801G	A task for substrings data structures, string suffix structures, strings	3400	x129
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x2715
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x9033
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x9277
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x15890
1800B	Count the Number of Pairs greedy, strings	1000	x19419
1800A	Is It a Cat? implementation, strings	800	x24054
1799C	Double Lexicographically Minimum greedy, strings	1700	x4285
1796B	Asterisk-Minor Template implementation, strings	1000	x13813
1796A	Typical Interview Problem brute force, implementation, strings	800	x16778
1795A	Two Towers brute force, implementation, strings	800	x21133
1794A	Prefix and Suffix Array strings	800	x14601
1791D	Distinct Split brute force, greedy, strings	1000	x20789
1791A	Codeforces Checking implementation, strings	800	x39953
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x30363
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x359
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x13951
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x5796
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x21597
1778C	Flexible String bitmasks, brute force, strings	1600	x6284
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x599
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1503
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x673
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2125
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x33691
1759A	Yes-Yes? implementation, strings	800	x24648
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x22010
1750F	Majority combinatorics, dp, math, strings	2700	x545
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1149
1748B	Diverse Substrings brute force, implementation, strings	1400	x12091
1742F	Smaller constructive algorithms, greedy, strings	1500	x8553
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x26455
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x414
1738H	Palindrome Addicts data structures, strings	3300	x159
1737A	Ela Sorting Books greedy, implementation, strings	900	x9235
1736D	Equal Binary Subsequences constructive algorithms, geometry, greedy, implementation, strings	2200	x2103
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x8410
1730D	Prefixes and Suffixes constructive algorithms, strings, two pointers	2200	x2336
1729G	Cut Substrings combinatorics, dp, hashing, strings, two pointers	2100	x1770
1729C	Jumping on Tiles constructive algorithms, strings	1100	x17162
1729B	Decode String greedy, strings	800	x26588
1721E	Prefix Function Queries dfs and similar, dp, hashing, string suffix structures, strings, trees	2200	x1530
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1513
1720D1	Xor-Subsequence (easy version) bitmasks, brute force, dp, strings, trees, two pointers	1800	x5021
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x7361
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x7607
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x21553
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x79
1703D	Double Strings brute force, data structures, strings	1100	x20510
1703C	Cypher brute force, implementation, strings	800	x29949
1703A	YES or YES? brute force, implementation, strings	800	x45977
1701E	Text Editor brute force, dp, greedy, strings	2500	x974
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x12486
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x13582
1690F	Shifting String graphs, math, number theory, strings	1700	x5863
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x7211
1685B	Linguistics greedy, implementation, sortings, strings	2000	x2816
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x22160
1682A	Palindromic Indices greedy, strings	800	x18250
1680C	Binary String binary search, greedy, strings, two pointers	1600	x8200
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x949
1676C	Most Similar Words brute force, greedy, implementation, implementation, math, strings	800	x25126
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x8666
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x20365
1673B	A Perfectly Balanced String? brute force, greedy, strings	1100	x13136
1673A	Subtle Substring Subtraction games, greedy, strings	800	x17528
1670B	Dorms War brute force, implementation, strings	1100	x11613
1669E	2-Letter Strings data structures, math, strings	1200	x14125
1663G	Six Characters *special problem, constructive algorithms, strings		x179
1663F	In Every Generation... *special problem, strings		x300
1662D	Evolution of Weasels greedy, implementation, strings		x1346
1662B	Toys greedy, strings		x119
1660F2	Promising String (hard version) data structures, implementation, math, strings	2100	x2296
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x6270
1660C	Get an Even String dp, greedy, strings	1300	x16608
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x9634
1654F	Minimal String Xoration bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings	2800	x870
1654B	Prefix Removals strings	800	x14971
1650A	Deletions of Two Adjacent Letters implementation, strings	800	x31013
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5305
1634A	Reverse and Concatenate greedy, strings	800	x22698
1628B	Peculiar Movie Preferences greedy, strings	1700	x10157
1626B	Minor Reduction greedy, strings	1100	x20538
1624E	Masha-forgetful brute force, constructive algorithms, dp, hashing, implementation, strings	2000	x3506

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