Problemset - Codeforces

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Educational Codeforces Round 170 (Rated for Div. 2)
13 days

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Difficulty: —

two pointers

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Problems

#	Name
2000D	Right Left Wrong greedy, implementation, two pointers	1200	x21694
2000B	Seating in a Bus two pointers	800	x32448
1997B	Make Three Regions constructive algorithms, two pointers	1100	x19901
1995B1	Bouquet (Easy Version) binary search, brute force, greedy, sortings, two pointers	1100	x17253
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x14807
1982C	Boring Day binary search, data structures, dp, greedy, two pointers	1200	x16929
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x13694
1972A	Contest Proposal brute force, greedy, two pointers	800	x22637
1968B	Prefiquence greedy, two pointers	800	x27513
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15067
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x15530
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x17190
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13856
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x21168
1921D	Very Different Array data structures, greedy, sortings, two pointers	1100	x21453
1904C	Array Game binary search, brute force, data structures, sortings, two pointers	1400	x12914
1904B	Collecting Game binary search, dp, greedy, sortings, two pointers	1100	x15249
1899C	Yarik and Array dp, greedy, two pointers	1100	x20988
1896B	AB Flipping greedy, strings, two pointers	900	x14707
1884B	Haunted House binary search, greedy, math, two pointers	1100	x12637
1883G1	Dances (Easy version) binary search, greedy, two pointers	1400	x10908
1873F	Money Trees binary search, greedy, math, two pointers	1300	x15426
1873D	1D Eraser greedy, implementation, two pointers	800	x34945
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11455
1851B	Parity Sort greedy, sortings, two pointers	800	x29243
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19962
1843B	Long Long greedy, math, two pointers	800	x28948
1843A	Sasha and Array Coloring greedy, sortings, two pointers	800	x34171
1840C	Ski Resort combinatorics, math, two pointers	1000	x27652
1840A	Cipher Shifer implementation, strings, two pointers	800	x33976
1832B	Maximum Sum brute force, sortings, two pointers	1100	x21901
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x18992
1820B	JoJo's Incredible Adventures math, strings, two pointers	1100	x14639
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x13790
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x20252
1791C	Prepend and Append implementation, two pointers	800	x45163
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x16199
1776H	Beppa and SwerChat two pointers	1300	x6385
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14338
1760D	Challenging Valleys implementation, two pointers	1000	x23622
1746B	Rebellion constructive algorithms, greedy, two pointers	800	x17145
1744C	Traffic Light binary search, implementation, two pointers	1000	x27132
1741C	Minimize the Thickness brute force, greedy, math, two pointers	1100	x17737
1736C1	Good Subarrays (Easy Version) binary search, data structures, schedules, two pointers	1300	x15010
1729D	Friends and the Restaurant greedy, sortings, two pointers	1200	x20636
1721C	Min-Max Array Transformation binary search, greedy, two pointers	1400	x13362
1719C	Fighting Tournament binary search, data structures, implementation, two pointers	1400	x13219
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x16982
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14347
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x17678
1692E	Binary Deque binary search, implementation, two pointers	1200	x21895
1691B	Shoe Shuffling constructive algorithms, greedy, implementation, two pointers	1000	x23023
1690D	Black and White Stripe implementation, two pointers	1000	x29512
1689A	Lex String brute force, greedy, implementation, sortings, two pointers	800	x16778
1676F	Longest Strike data structures, greedy, implementation, sortings, two pointers	1300	x16694
1669F	Eating Candies binary search, data structures, greedy, two pointers	1100	x25725
1656B	Subtract Operation data structures, greedy, math, two pointers	1100	x18829
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x21148
1628A	Meximum Array binary search, constructive algorithms, greedy, implementation, math, two pointers	1400	x15601
1610B	Kalindrome Array greedy, two pointers	1100	x15855
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9728
1598C	Delete Two Elements data structures, dp, implementation, math, two pointers	1200	x20792
1582C	Grandma Capa Knits a Scarf brute force, data structures, greedy, strings, two pointers	1200	x15603
1547C	Pair Programming greedy, two pointers	1100	x22627
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x28476
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16482
1470A	Strange Birthday Party binary search, dp, greedy, sortings, two pointers	1300	x22419
1462A	Favorite Sequence implementation, two pointers	800	x41614
1431B	Polycarp and the Language of Gods *special problem, implementation, two pointers	1400	x1011
1399C	Boats Competition brute force, greedy, two pointers	1200	x28844
1374D	Zero Remainder Array math, sortings, two pointers	1400	x23746
1369C	RationalLee greedy, math, sortings, two pointers	1400	x19573
1366B	Shuffle math, two pointers	1300	x20995
1364B	Most socially-distanced subsequence greedy, two pointers	1300	x19849
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x28041
1359B	New Theatre Square brute force, dp, greedy, implementation, two pointers	1000	x27781
1354B	Ternary String binary search, dp, implementation, two pointers	1200	x30887
1343C	Alternating Subsequence dp, greedy, two pointers	1200	x38344
1324D	Pair of Topics binary search, data structures, sortings, two pointers	1400	x28257
1305B	Kuroni and Simple Strings constructive algorithms, greedy, strings, two pointers	1200	x11747
1265B	Beautiful Numbers data structures, implementation, math, two pointers	1300	x12578
1257C	Dominated Subarray greedy, implementation, sortings, strings, two pointers	1200	x15952
1251A	Broken Keyboard brute force, strings, two pointers	1000	x19609
1237B	Balanced Tunnel data structures, sortings, two pointers	1300	x16006
1225B2	TV Subscriptions (Hard Version) implementation, two pointers	1300	x10599
1190A	Tokitsukaze and Discard Items implementation, two pointers	1400	x9359
1133C	Balanced Team sortings, two pointers	1200	x22826
1107C	Brutality greedy, sortings, two pointers	1300	x9945
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x12135
1006C	Three Parts of the Array binary search, data structures, two pointers	1200	x21094
978C	Letters binary search, implementation, two pointers	1000	x25483
961B	Lecture Sleep data structures, dp, implementation, two pointers	1200	x20792
920C	Swap Adjacent Elements dfs and similar, greedy, math, sortings, two pointers	1400	x9172
892B	Wrath greedy, implementation, two pointers	1200	x8964
888C	K-Dominant Character binary search, implementation, two pointers	1400	x8222
842A	Kirill And The Game brute force, two pointers	1200	x10178
769B	News About Credit *special problem, greedy, two pointers	1200	x3287
762B	USB vs. PS/2 greedy, implementation, sortings, two pointers	1400	x8067
716B	Complete the Word greedy, two pointers	1300	x12149
602B	Approximating a Constant Range dp, implementation, two pointers	1400	x10802

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