Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
24:38:59
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Before contest
Codeforces Round 941 (Div. 2)
24:38:59
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strings

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Problems

#	Name
1952H	Palindrome implementation, strings		x335
1952B	Is it stated? strings		x10132
1952A	Are You a Robot, Again? strings		x11200
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x2850
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3257
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11291
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x7978
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3135
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x29191
1935A	Entertainment in MAC constructive algorithms, strings	800	x25198
1931A	Recovering a Small String brute force, strings	800	x33288
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2339
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3646
1927B	Following the String constructive algorithms, greedy, strings	900	x30069
1927A	Make it White greedy, strings	800	x39342
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27012
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12190
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x319
1922A	Tricky Template constructive algorithms, implementation, strings	800	x25739
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19212
1915D	Unnatural Language Processing greedy, implementation, strings	900	x27391
1914A	Problemsolving Log implementation, strings	800	x29478
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x286
1913B	Swap and Delete strings	1000	x21418
1912L	LOL Lovers strings	800	x6243
1909G	Pumping Lemma hashing, strings	3000	x318
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18231
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x23030
1905C	Largest Subsequence greedy, strings	1400	x10957
1902E	Collapsing Strings data structures, strings, trees	1900	x3711
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x21519
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2028
1898A	Milica and String brute force, implementation, strings	800	x14974
1896B	AB Flipping greedy, strings, two pointers	900	x13271
1894A	Secret Sport implementation, strings	800	x18020
1886C	Decreasing String implementation, strings	1600	x10131
1883B	Chemistry strings	900	x26445
1881A	Don't Try to Count brute force, strings	800	x27082
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15739
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2459
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x14718
1862A	Gift Carpet dp, greedy, implementation, strings	800	x30561
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9407
1860A	Not a Substring constructive algorithms, strings	900	x20725
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5265
1850C	Word on the Paper implementation, strings	800	x40687
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x9774
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3589
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x25965
1845C	Strong Password binary search, dp, greedy, strings	1400	x13275
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11577
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7270
1840A	Cipher Shifer implementation, strings, two pointers	800	x32425
1838D	Bracket Walk data structures, greedy, strings	2100	x3053
1834C	Game with Reversing games, greedy, math, strings	1200	x12577
1833A	Musical Puzzle implementation, strings	800	x31467
1832A	New Palindrome strings	800	x24718
1829A	Love Story implementation, strings	800	x45465
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1132
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x19245
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3636
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9646
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2230
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13535
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x13284
1820A	Yura's New Name implementation, strings	800	x16330
1817F	Entangled Substrings string suffix structures, strings	3500	x178
1815E	Bosco and Particle dp, math, number theory, strings	3100	x323
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5782
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13035
1811A	Insert Digit greedy, math, strings	800	x29941
1807C	Find and Replace greedy, implementation, strings	800	x29069
1805B	The String Has a Target greedy, strings	800	x18151
1801G	A task for substrings data structures, string suffix structures, strings	3400	x336
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3671
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x11985
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12095
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x21591
1800B	Count the Number of Pairs greedy, strings	1000	x23867
1800A	Is It a Cat? implementation, strings	800	x29893
1799C	Double Lexicographically Minimum greedy, strings	1700	x5435
1796B	Asterisk-Minor Template implementation, strings	1000	x15986
1796A	Typical Interview Problem brute force, implementation, strings	800	x18530
1795A	Two Towers brute force, implementation, strings	800	x23211
1794A	Prefix and Suffix Array strings	800	x16531
1791D	Distinct Split brute force, greedy, strings	1000	x26706
1791A	Codeforces Checking implementation, strings	800	x54533
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x35516
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x511
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15746
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7012
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x22868
1778C	Flexible String bitmasks, brute force, strings	1600	x7625
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x813
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1944
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x956
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2587
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x41457
1759A	Yes-Yes? implementation, strings	800	x28677
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x24329

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