Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
07:55:55
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Problems

#	Name
1952H	Palindrome implementation, strings		x338
1952B	Is it stated? strings		x10177
1952A	Are You a Robot, Again? strings		x11238
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x2891
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3297
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11419
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8019
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3162
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x29275
1935A	Entertainment in MAC constructive algorithms, strings	800	x25246
1931A	Recovering a Small String brute force, strings	800	x33338
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2341
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3650
1927B	Following the String constructive algorithms, greedy, strings	900	x30118
1927A	Make it White greedy, strings	800	x39426
1925A	We Got Everything Covered! constructive algorithms, greedy, strings	800	x27039
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x12216
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x322
1922A	Tricky Template constructive algorithms, implementation, strings	800	x25776
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19255
1915D	Unnatural Language Processing greedy, implementation, strings	900	x27432
1914A	Problemsolving Log implementation, strings	800	x29511
1913F	Palindromic Problem binary search, data structures, hashing, string suffix structures, strings	2800	x286
1913B	Swap and Delete strings	1000	x21479
1912L	LOL Lovers strings	800	x6257
1909G	Pumping Lemma hashing, strings	3000	x318
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18258
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x23051
1905C	Largest Subsequence greedy, strings	1400	x10979
1902E	Collapsing Strings data structures, strings, trees	1900	x3715
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x21584
1898E	Sofia and Strings data structures, greedy, sortings, strings, two pointers	2200	x2031
1898A	Milica and String brute force, implementation, strings	800	x14993
1896B	AB Flipping greedy, strings, two pointers	900	x13288
1894A	Secret Sport implementation, strings	800	x18048
1886C	Decreasing String implementation, strings	1600	x10146
1883B	Chemistry strings	900	x26494
1881A	Don't Try to Count brute force, strings	800	x27135
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15767
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2459
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x14728
1862A	Gift Carpet dp, greedy, implementation, strings	800	x30597
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9418
1860A	Not a Substring constructive algorithms, strings	900	x20742
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5275
1850C	Word on the Paper implementation, strings	800	x40754
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x9786
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3590
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x25981
1845C	Strong Password binary search, dp, greedy, strings	1400	x13287
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11582
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7278
1840A	Cipher Shifer implementation, strings, two pointers	800	x32447
1838D	Bracket Walk data structures, greedy, strings	2100	x3068
1834C	Game with Reversing games, greedy, math, strings	1200	x12588
1833A	Musical Puzzle implementation, strings	800	x31487
1832A	New Palindrome strings	800	x24737
1829A	Love Story implementation, strings	800	x45594
1827C	Palindrome Partition binary search, brute force, data structures, dp, hashing, strings	2600	x1134
1825A	LuoTianyi and the Palindrome String greedy, strings	800	x19249
1823D	Unique Palindromes constructive algorithms, math, strings	1900	x3638
1822E	Making Anti-Palindromes greedy, math, strings	1600	x9652
1821E	Rearrange Brackets brute force, dp, greedy, sortings, strings	2100	x2234
1821C	Tear It Apart brute force, implementation, math, strings	1300	x13556
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x13301
1820A	Yura's New Name implementation, strings	800	x16337
1817F	Entangled Substrings string suffix structures, strings	3500	x178
1815E	Bosco and Particle dp, math, number theory, strings	3100	x324
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5785
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13041
1811A	Insert Digit greedy, math, strings	800	x29950
1807C	Find and Replace greedy, implementation, strings	800	x29083
1805B	The String Has a Target greedy, strings	800	x18152
1801G	A task for substrings data structures, string suffix structures, strings	3400	x337
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3673
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x11994
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x12105
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x21614
1800B	Count the Number of Pairs greedy, strings	1000	x23874
1800A	Is It a Cat? implementation, strings	800	x29908
1799C	Double Lexicographically Minimum greedy, strings	1700	x5439
1796B	Asterisk-Minor Template implementation, strings	1000	x15995
1796A	Typical Interview Problem brute force, implementation, strings	800	x18537
1795A	Two Towers brute force, implementation, strings	800	x23217
1794A	Prefix and Suffix Array strings	800	x16533
1791D	Distinct Split brute force, greedy, strings	1000	x26749
1791A	Codeforces Checking implementation, strings	800	x54604
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x35543
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	x15748
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7018
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x22872
1778C	Flexible String bitmasks, brute force, strings	1600	x7629
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x814
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1949
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x959
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2592
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x41525
1759A	Yes-Yes? implementation, strings	800	x28699
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x24338

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