Problemset - Codeforces

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Problems

#	Name
1996C	Sort strings		x13813
1995D	Cases bitmasks, brute force, dp, strings		x1221
1994H	Fortnite combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings		x97
1992E	Novice's Mistake brute force, constructive algorithms, implementation, math, strings	1700	x7653
1989B	Substring and Subsequence brute force, greedy, strings	1200	x17571
1985A	Creating Words implementation, strings	800	x45366
1984D	''a'' String Problem brute force, hashing, implementation, math, string suffix structures, strings	2000	x2875
1980G	Yasya and the Mysterious Tree bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees	2300	x1035
1979D	Fixing a Binary String bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings	1800	x5889
1976A	Verify Password implementation, sortings, strings	800	x26314
1975H	378QAQ and Core greedy, strings	3500	x90
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x204
1974B	Symmetric Encoding implementation, sortings, strings	800	x28666
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x23805
1971B	Different String implementation, strings	800	x33579
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x170
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x517
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1740
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3855
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1711
1952H	Palindrome implementation, strings		x394
1952B	Is it stated? strings		x10655
1952A	Are You a Robot, Again? strings		x11831
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3369
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4007
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x13401
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8828
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3590
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x31767
1935A	Entertainment in MAC constructive algorithms, strings	800	x26873
1931A	Recovering a Small String brute force, strings	800	x34948
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2508
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3915
1927B	Following the String constructive algorithms, greedy, strings	900	x31886
1927A	Make it White greedy, strings	800	x41534
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x28054
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x13176
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x358
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26484
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x20795
1915D	Unnatural Language Processing greedy, implementation, strings	900	x29099
1914A	Problemsolving Log implementation, strings	800	x30815
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x304
1913B	Swap and Delete strings	1000	x24192
1912L	LOL Lovers strings	800	x6693
1909G	Pumping Lemma hashing, strings	3000	x373
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x19379
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x24485
1905C	Largest Subsequence greedy, strings	1400	x11636
1902E	Collapsing Strings data structures, strings, trees	1900	x4096
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x24610
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2167
1898A	Milica and String brute force, implementation, strings	800	x15580
1896B	AB Flipping greedy, strings, two pointers	900	x14162
1894A	Secret Sport implementation, strings	800	x18581
1886C	Decreasing String implementation, strings	1600	x10939
1883B	Chemistry strings	900	x29599
1881A	Don't Try to Count brute force, strings	800	x29730
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16428
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2525
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x15113
1862A	Gift Carpet dp, greedy, implementation, strings	800	x31851
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9819
1860A	Not a Substring constructive algorithms, strings	900	x21324
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5599
1850C	Word on the Paper implementation, strings	800	x42838
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x10216
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3681
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x26584
1845C	Strong Password binary search, dp, greedy, strings	1400	x13848
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x12048
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7632
1840A	Cipher Shifer implementation, strings, two pointers	800	x33495
1838D	Bracket Walk data structures, greedy, strings	2100	x3168
1834C	Game with Reversing games, greedy, math, strings	1200	x13022
1833A	Musical Puzzle implementation, strings	800	x32188
1832A	New Palindrome strings	800	x25247
1829A	Love Story implementation, strings	800	x48529
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1169
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x19491
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3751
1822E	Making Anti-Palindromes greedy, math, strings	1600	x10170
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2327
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13998
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x14085
1820A	Yura's New Name implementation, strings	800	x16530
1817F	Entangled Substrings string suffix structures, strings	3500	x187
1815E	Bosco and Particle dp, math, number theory, strings	3100	x335
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5849
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13171
1811A	Insert Digit greedy, math, strings	800	x30609
1807C	Find and Replace greedy, implementation, strings	800	x29847
1805B	The String Has a Target greedy, strings	800	x18395
1801G	A task for substrings data structures, string suffix structures, strings	3400	x357
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3799
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12460
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12504
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x22585
1800B	Count the Number of Pairs greedy, strings	1000	x24577
1800A	Is It a Cat? implementation, strings	800	x30784

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