Problemset - Codeforces

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Educational Codeforces Round 166 (Rated for Div. 2)
32:18:23
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Problems

#	Name
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24004
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x29282
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x214
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1571
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3803
1928C	Physical Education Lesson brute force, math, number theory	1600	x7644
1928A	Rectangle Cutting geometry, math	800	x21396
1927G	Paint Charges data structures, dp, greedy, math	2300	x1512
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x12618
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25884
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10317
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3284
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18468
1924D	Balanced Subsequences combinatorics, dp, math	2700	x789
1924C	Fractal Origami geometry, math, matrices	2400	x1058
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2305
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7130
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5273
1922C	Closest Cities greedy, implementation, math	1300	x17061
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19228
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3498
1921E	Eat the Chip brute force, games, greedy, math	1600	x9019
1921C	Sending Messages greedy, math	900	x27562
1921A	Square greedy, math	800	x40328
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2403
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5160
1920C	Partitioning the Array brute force, math, number theory	1600	x12011
1920B	Summation Game games, greedy, math, sortings	1100	x19454
1920A	Satisfying Constraints brute force, greedy, math	800	x26650
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x784
1919A	Wallet Exchange games, math	800	x31922
1918G	Permutation of Given constructive algorithms, math	2700	x429
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12747
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x28924
1917E	Construct Matrix constructive algorithms, math	2500	x1281
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1675
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9505
1917A	Least Product constructive algorithms, math	800	x24344
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x503
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x585
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x7957
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x16834
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23897
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24690
1915E	Romantic Glasses data structures, greedy, math	1300	x18829
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1696
1914C	Quests greedy, math	1100	x21122
1914B	Preparing for the Contest constructive algorithms, math	800	x28769
1912I	Innovative Washing Machine geometry, math, two pointers	3300	x54
1912F	Fugitive Frenzy math, probabilities	3100	x105
1912E	Evaluate It and Back Again constructive algorithms, implementation, math	2200	x797
1912D	Divisibility Test math	1900	x1342
1912B	Blueprint for Seating combinatorics, divide and conquer, math	2100	x943
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x94
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x840
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1655
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1266
1909D	Split Plus K greedy, math, number theory	1900	x4039
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x10115
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14282
1909A	Distinct Buttons implementation, math	800	x15809
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18651
1906M	Triangle Construction greedy, math	1700	x2362
1906K	Deck-Building Game divide and conquer, math	2500	x265
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x863
1905D	Cyclic MEX data structures, implementation, math, two pointers	2000	x3545
1905A	Constructive Problems constructive algorithms, math	800	x21931
1903E	Geo Game greedy, interactive, math	2000	x1821
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x905
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12451
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6276
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x10818
1901B	Chip and Ribbon greedy, math	1100	x14132
1901A	Line Trip greedy, math	800	x25944
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3763
1900B	Laura and Operations dp, math	900	x16185
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12394
1899A	Game with Integers games, math, number theory	800	x38793
1898D	Absolute Beauty greedy, math	1900	x4802
1898B	Milena and Admirer greedy, math	1500	x10628
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x93
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x82
1896F	Bracket Xoring constructive algorithms, greedy, implementation, math	2600	x659
1896D	Ones and Twos binary search, data structures, divide and conquer, math, two pointers	1700	x5264
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x641
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5623
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10207
1895B	Points and Minimum Distance greedy, math, sortings	800	x19734
1895A	Treasure Chest math	800	x23552
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x778
1891D	Suspicious logarithms binary search, brute force, math	1900	x3733
1891B	Deja Vu brute force, math, sortings	1100	x16046
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x6819
1887D	Split binary search, data structures, divide and conquer, dsu, math, trees, two pointers	2700	x827
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1342
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3355
1886B	Fear of the Dark binary search, geometry, math	1200	x15302
1886A	Sum of Three brute force, constructive algorithms, math	800	x24677
1884E	Hard Design greedy, implementation, math	2800	x264
1884D	Counting Rhyme dp, math, number theory	2100	x2886