Problemset - Codeforces

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Codeforces Round (Div. 1 + Div. 2)
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Problems

#	Name
1974B	Symmetric Encoding implementation, sortings, strings		x22592
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x19827
1971B	Different String implementation, strings	800	x28243
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x131
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x418
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1425
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3231
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1467
1952H	Palindrome implementation, strings		x358
1952B	Is it stated? strings		x10359
1952A	Are You a Robot, Again? strings		x11440
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3071
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3581
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12235
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8301
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3374
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x30025
1935A	Entertainment in MAC constructive algorithms, strings	800	x25685
1931A	Recovering a Small String brute force, strings	800	x33792
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2383
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3717
1927B	Following the String constructive algorithms, greedy, strings	900	x30625
1927A	Make it White greedy, strings	800	x39992
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27290
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12469
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x334
1922A	Tricky Template constructive algorithms, implementation, strings	800	x25944
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19589
1915D	Unnatural Language Processing greedy, implementation, strings	900	x27919
1914A	Problemsolving Log implementation, strings	800	x29921
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x290
1913B	Swap and Delete strings	1000	x22193
1912L	LOL Lovers strings	800	x6379
1909G	Pumping Lemma hashing, strings	3000	x321
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18572
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x23480
1905C	Largest Subsequence greedy, strings	1400	x11112
1902E	Collapsing Strings data structures, strings, trees	1900	x3793
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x22332
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2064
1898A	Milica and String brute force, implementation, strings	800	x15140
1896B	AB Flipping greedy, strings, two pointers	900	x13520
1894A	Secret Sport implementation, strings	800	x18174
1886C	Decreasing String implementation, strings	1600	x10321
1883B	Chemistry strings	900	x27265
1881A	Don't Try to Count brute force, strings	800	x27772
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15913
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2475
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x14815
1862A	Gift Carpet dp, greedy, implementation, strings	800	x30987
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9520
1860A	Not a Substring constructive algorithms, strings	900	x20885
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5347
1850C	Word on the Paper implementation, strings	800	x41423
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x9896
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3610
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x26161
1845C	Strong Password binary search, dp, greedy, strings	1400	x13403
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11673
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7340
1840A	Cipher Shifer implementation, strings, two pointers	800	x32745
1838D	Bracket Walk data structures, greedy, strings	2100	x3088
1834C	Game with Reversing games, greedy, math, strings	1200	x12689
1833A	Musical Puzzle implementation, strings	800	x31675
1832A	New Palindrome strings	800	x24945
1829A	Love Story implementation, strings	800	x46293
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1150
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x19312
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3667
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9758
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2259
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13646
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x13482
1820A	Yura's New Name implementation, strings	800	x16382
1817F	Entangled Substrings string suffix structures, strings	3500	x180
1815E	Bosco and Particle dp, math, number theory, strings	3100	x329
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5800
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13072
1811A	Insert Digit greedy, math, strings	800	x30130
1807C	Find and Replace greedy, implementation, strings	800	x29296
1805B	The String Has a Target greedy, strings	800	x18201
1801G	A task for substrings data structures, string suffix structures, strings	3400	x351
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3712
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12122
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12202
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x21821
1800B	Count the Number of Pairs greedy, strings	1000	x24024
1800A	Is It a Cat? implementation, strings	800	x30096
1799C	Double Lexicographically Minimum greedy, strings	1700	x5488
1796B	Asterisk-Minor Template implementation, strings	1000	x16070
1796A	Typical Interview Problem brute force, implementation, strings	800	x18583
1795A	Two Towers brute force, implementation, strings	800	x23269
1794A	Prefix and Suffix Array strings	800	x16595
1791D	Distinct Split brute force, greedy, strings	1000	x27167
1791A	Codeforces Checking implementation, strings	800	x55522
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x35751
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x521
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15823
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7096
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x22911

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