Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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strings

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Problems

#	Name
1421C	Palindromifier constructive algorithms, strings	1400	x12466
1670B	Dorms War brute force, implementation, strings	1100	x12398
735A	Ostap and Grasshopper implementation, strings	800	x12274
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x12209
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12170
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12086
1029A	Many Equal Substrings implementation, strings	1300	x11990
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x11974
721B	Passwords implementation, math, sortings, strings	1100	x11964
78A	Haiku implementation, strings	800	x11899
1107A	Digits Sequence Dividing greedy, strings	900	x11868
1085A	Right-Left Cipher implementation, strings	800	x11859
165C	Another Problem on Strings binary search, brute force, dp, math, strings, two pointers	1600	x11847
1187B	Letters Shop binary search, implementation, strings	1300	x11843
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x11816
776A	A Serial Killer brute force, implementation, strings	900	x11811
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x11707
1379A	Acacius and String brute force, implementation, strings	1500	x11596
1326D1	Prefix-Suffix Palindrome (Easy version) hashing, string suffix structures, strings	1500	x11581
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11571
1307C	Cow and Message brute force, dp, math, strings	1500	x11525
1609B	William the Vigilant implementation, strings	1100	x11492
1305B	Kuroni and Simple Strings constructive algorithms, greedy, strings, two pointers	1200	x11273
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11204
1952A	Are You a Robot, Again? strings		x11170
1628B	Peculiar Movie Preferences greedy, strings	1700	x11164
1140B	Good String implementation, strings	1200	x11134
778A	String Game binary search, greedy, strings	1700	x11060
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11019
1151A	Maxim and Biology brute force, strings	1000	x10973
1316B	String Modification brute force, constructive algorithms, implementation, sortings, strings	1400	x10942
1905C	Largest Subsequence greedy, strings	1400	x10924
755B	PolandBall and Game binary search, data structures, games, greedy, sortings, strings	1100	x10904
63A	Sinking Ship implementation, sortings, strings	900	x10828
1182B	Plus from Picture dfs and similar, implementation, strings	1300	x10825
1251B	Binary Palindromes greedy, strings	1400	x10715
1742F	Smaller constructive algorithms, greedy, strings	1500	x10714
877A	Alex and broken contest implementation, strings	1100	x10683
1659B	Bit Flipping bitmasks, constructive algorithms, greedy, strings	1300	x10592
598B	Queries on a String implementation, strings	1300	x10415
844A	Diversity greedy, implementation, strings	1000	x10352
559B	Equivalent Strings divide and conquer, hashing, sortings, strings	1700	x10346
1096B	Substring Removal combinatorics, math, strings	1300	x10323
745A	Hongcow Learns the Cyclic Shift implementation, strings	900	x10288
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x10222
271D	Good Substrings data structures, strings	1800	x10211
1063A	Oh Those Palindromes constructive algorithms, strings	1300	x10206
989A	A Blend of Springtime implementation, strings	900	x10138
1886C	Decreasing String implementation, strings	1600	x10111
1952B	Is it stated? strings		x10105
94A	Restoring Password implementation, strings	900	x10099
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10057
625B	War of the Corporations constructive algorithms, greedy, strings	1200	x10052
801B	Valued Keys constructive algorithms, greedy, strings	900	x10001
723B	Text Document Analysis expression parsing, implementation, strings	1100	x9988
1737A	Ela Sorting Books greedy, implementation, strings	900	x9928
110B	Lucky String constructive algorithms, strings	1100	x9920
1220C	Substring Game in the Lesson games, greedy, strings	1300	x9888
548A	Mike and Fax brute force, implementation, strings	1100	x9828
1105B	Zuhair and Strings brute force, implementation, strings	1100	x9785
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x9760
554B	Ohana Cleans Up brute force, greedy, strings	1200	x9662
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9632
712B	Memory and Trident implementation, strings	1100	x9600
1735C	Phase Shift dfs and similar, dsu, graphs, greedy, implementation, strings	1400	x9537
385B	Bear and Strings brute force, greedy, implementation, math, strings	1200	x9502
616A	Comparing Two Long Integers implementation, strings	900	x9497
1326D2	Prefix-Suffix Palindrome (Hard version) binary search, greedy, hashing, string suffix structures, strings	1800	x9496
1321C	Remove Adjacent brute force, constructive algorithms, greedy, strings	1600	x9474
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9459
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9393
549A	Face Detection implementation, strings	900	x9340
822B	Crossword solving brute force, implementation, strings	1000	x9314
1473D	Program data structures, dp, implementation, strings	1700	x9291
525B	Pasha and String constructive algorithms, greedy, math, strings	1400	x9171
108A	Palindromic Times implementation, strings	1000	x9155
665C	Simple Strings dp, greedy, strings	1300	x9111
518A	Vitaly and Strings constructive algorithms, strings	1600	x9105
1295B	Infinite Prefixes math, strings	1700	x9065
1554D	Diane constructive algorithms, greedy, strings	1800	x9050
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9035
981A	Antipalindrome brute force, implementation, strings	900	x9021
975A	Aramic script implementation, strings	900	x8955
1315B	Homecoming binary search, dp, greedy, strings	1300	x8946
259A	Little Elephant and Chess brute force, strings	1000	x8916
490C	Hacking Cypher brute force, math, number theory, strings	1700	x8897
864B	Polycarp and Letters brute force, implementation, strings	1000	x8867
708A	Letters Cyclic Shift constructive algorithms, greedy, implementation, strings	1200	x8843
946C	String Transformation greedy, strings	1300	x8757
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x8561
747B	Mammoth's Genome Decoding implementation, strings	900	x8527
868A	Bark to Unlock brute force, implementation, strings	900	x8507
1023A	Single Wildcard Pattern Matching brute force, implementation, strings	1200	x8502
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8469
1051A	Vasya And Password greedy, implementation, strings	1200	x8305
1146B	Hate "A" implementation, strings	1100	x8294
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x8282
798B	Mike and strings brute force, dp, strings	1300	x8258
432D	Prefixes and Suffixes dp, string suffix structures, strings, two pointers	2000	x8157
591B	Rebranding implementation, strings	1200	x8126