Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
2 days
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strings

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Problems

#	Name
1975H	378QAQ and Core greedy, strings	3500	x37
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x136
1974B	Symmetric Encoding implementation, sortings, strings	800	x25603
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x20962
1971B	Different String implementation, strings	800	x29676
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x138
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x438
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1499
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x3380
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1530
1952H	Palindrome implementation, strings		x361
1952B	Is it stated? strings		x10418
1952A	Are You a Robot, Again? strings		x11500
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3121
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3643
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12441
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8390
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3407
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x30296
1935A	Entertainment in MAC constructive algorithms, strings	800	x25884
1931A	Recovering a Small String brute force, strings	800	x33966
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2400
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3746
1927B	Following the String constructive algorithms, greedy, strings	900	x30789
1927A	Make it White greedy, strings	800	x40188
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27421
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12570
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x338
1922A	Tricky Template constructive algorithms, implementation, strings	800	x26048
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19761
1915D	Unnatural Language Processing greedy, implementation, strings	900	x28067
1914A	Problemsolving Log implementation, strings	800	x30022
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x292
1913B	Swap and Delete strings	1000	x22519
1912L	LOL Lovers strings	800	x6417
1909G	Pumping Lemma hashing, strings	3000	x327
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18690
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x23632
1905C	Largest Subsequence greedy, strings	1400	x11172
1902E	Collapsing Strings data structures, strings, trees	1900	x3927
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x22649
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2076
1898A	Milica and String brute force, implementation, strings	800	x15199
1896B	AB Flipping greedy, strings, two pointers	900	x13633
1894A	Secret Sport implementation, strings	800	x18224
1886C	Decreasing String implementation, strings	1600	x10409
1883B	Chemistry strings	900	x27568
1881A	Don't Try to Count brute force, strings	800	x28062
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15990
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2480
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x14857
1862A	Gift Carpet dp, greedy, implementation, strings	800	x31103
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9575
1860A	Not a Substring constructive algorithms, strings	900	x20954
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5385
1850C	Word on the Paper implementation, strings	800	x41620
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x9938
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3621
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x26198
1845C	Strong Password binary search, dp, greedy, strings	1400	x13456
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11723
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7373
1840A	Cipher Shifer implementation, strings, two pointers	800	x32850
1838D	Bracket Walk data structures, greedy, strings	2100	x3098
1834C	Game with Reversing games, greedy, math, strings	1200	x12730
1833A	Musical Puzzle implementation, strings	800	x31730
1832A	New Palindrome strings	800	x25001
1829A	Love Story implementation, strings	800	x46678
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1154
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x19343
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3674
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9807
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2270
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13711
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x13554
1820A	Yura's New Name implementation, strings	800	x16405
1817F	Entangled Substrings string suffix structures, strings	3500	x184
1815E	Bosco and Particle dp, math, number theory, strings	3100	x330
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5809
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13094
1811A	Insert Digit greedy, math, strings	800	x30197
1807C	Find and Replace greedy, implementation, strings	800	x29355
1805B	The String Has a Target greedy, strings	800	x18220
1801G	A task for substrings data structures, string suffix structures, strings	3400	x353
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3724
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x12173
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12235
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x21907
1800B	Count the Number of Pairs greedy, strings	1000	x24086
1800A	Is It a Cat? implementation, strings	800	x30176
1799C	Double Lexicographically Minimum greedy, strings	1700	x5510
1796B	Asterisk-Minor Template implementation, strings	1000	x16108
1796A	Typical Interview Problem brute force, implementation, strings	800	x18602
1795A	Two Towers brute force, implementation, strings	800	x23293
1794A	Prefix and Suffix Array strings	800	x16659
1791D	Distinct Split brute force, greedy, strings	1000	x27347
1791A	Codeforces Checking implementation, strings	800	x55807
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x35821
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x523
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x15853

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