Problemset - Codeforces

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Educational Codeforces Round 169 (Rated for Div. 2)
16:35:07
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Problems

#	Name
1995B2	Bouquet (Hard Version) binary search, data structures, greedy, math, sortings, two pointers	1700	x7604
1994C	Hungry Games binary search, dp, two pointers	1600	x9202
1992E	Novice's Mistake brute force, constructive algorithms, implementation, math, strings	1700	x8248
1990C	Mad MAD Sum brute force, greedy, math	1500	x9951
1989C	Two Movies greedy, math	1400	x16790
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x14886
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x7966
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x14118
1985H1	Maximize the Largest Component (Easy Version) brute force, data structures, dfs and similar, dsu, graphs, implementation	1700	x5026
1985G	D-Function combinatorics, math, number theory	1600	x8449
1985F	Final Boss binary search, data structures	1500	x13914
1984C2	Magnitude (Hard Version) combinatorics, dp, greedy, math	1700	x6753
1984C1	Magnitude (Easy Version) dp, greedy, math	1300	x15274
1983D	Swap Dilemma constructive algorithms, data structures, divide and conquer, greedy, math, sortings	1700	x7455
1983C	Have Your Cake and Eat It Too binary search, brute force, greedy, implementation	1400	x11436
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x6500
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x12762
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x9673
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x13373
1980C	Sofia and the Lost Operations constructive algorithms, greedy	1300	x17497
1978D	Elections data structures, greedy, implementation, math	1600	x10257
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x13762
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x9581
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees	1700	x5518
1974D	Ingenuity-2 constructive algorithms, greedy, implementation	1400	x13866
1974C	Beautiful Triple Pairs combinatorics, data structures	1400	x14837
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7790
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x13198
1971G	XOUR data structures, dsu, sortings	1700	x8519
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x9215
1971E	Find the Car binary search, math, sortings	1500	x13207
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2277
1970C1	Game on Tree (Easy) games	1400	x2966
1969C	Minimizing the Sum dp, implementation	1700	x7962
1968E	Cells Arrangement constructive algorithms	1600	x9770
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x14124
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x12438
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x11649
1965A	Everything Nim games, greedy, math, sortings	1400	x12737
1958D	Staircase *special problem	1600	x465
1958C	Firewood *special problem	1500	x636
1958B	Clock in the Pool *special problem, math	1400	x810
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9061
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12274
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8163
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x14627
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x20200
1951C	Ticket Hoarding greedy, math, sortings	1400	x11077
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8672
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x13706
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x2785
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8941
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x16025
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x10243
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7736
1945D	Seraphim the Owl dp, greedy	1300	x13779
1943A	MEX Game 1 games, greedy	1300	x17016
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5940
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x10520
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9170
1938H	Pho Restaurant	1600	x2038
1937B	Binary Path dp, greedy, implementation	1300	x14367
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7105
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6481
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10748
1932E	Final Countdown implementation, math, number theory	1600	x7746
1932D	Card Game greedy, implementation	1400	x11002
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x15105
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x7687
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x14949
1931D	Divisible Pairs combinatorics, math, number theory	1300	x17819
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6823
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x14283
1928C	Physical Education Lesson brute force, math, number theory	1600	x8170
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13493
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x20323
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11352
1926D	Vlad and Division bitmasks, greedy	1300	x14915
1924A	Did We Get Everything Covered? constructive algorithms, dp, greedy, shortest paths, strings	1500	x13341
1923C	Find B constructive algorithms, greedy	1400	x14444
1922C	Closest Cities greedy, implementation, math	1300	x17931
1921E	Eat the Chip brute force, games, greedy, math	1600	x9494
1920C	Partitioning the Array brute force, math, number theory	1600	x12930
1919C	Grouping Increases data structures, dp, greedy	1400	x18154
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13485
1917C	Watering an Array brute force, greedy, implementation, math	1600	x10029
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x8315
1915F	Greetings data structures, divide and conquer, sortings	1500	x12947
1915E	Romantic Glasses data structures, greedy, math	1300	x20482
1914E2	Game with Marbles (Hard Version) games, greedy, sortings	1400	x11975
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x11847
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x14527
1910C	Poisonous Swamp special problem, special problem, implementation, implementation	1600	x619
1910B	Security Guard *special problem, greedy	1600	x657
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x10787
1907E	Good Triples brute force, combinatorics, number theory	1600	x9766
1907D	Jumping Through Segments binary search, constructive algorithms	1400	x13372
1906M	Triangle Construction greedy, math	1700	x2531
1905C	Largest Subsequence greedy, strings	1400	x11869
1904D1	Set To Max (Easy Version) brute force, constructive algorithms, greedy	1600	x6362

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