Problemset - Codeforces

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Codeforces Round 946 (Div. 3)
3 days
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Problems

#	Name
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x12475
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25675
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x10138
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3244
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18302
1924D	Balanced Subsequences combinatorics, dp, math	2700	x778
1924C	Fractal Origami geometry, math, matrices	2400	x1046
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2284
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7072
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5245
1922C	Closest Cities greedy, implementation, math	1300	x16943
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19088
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3466
1921E	Eat the Chip brute force, games, greedy, math	1600	x8948
1921C	Sending Messages greedy, math	900	x27399
1921A	Square greedy, math	800	x40076
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2378
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5123
1920C	Partitioning the Array brute force, math, number theory	1600	x11886
1920B	Summation Game games, greedy, math, sortings	1100	x19355
1920A	Satisfying Constraints brute force, greedy, math	800	x26556
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x778
1919A	Wallet Exchange games, math	800	x31803
1918G	Permutation of Given constructive algorithms, math	2700	x426
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12617
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x28818
1917E	Construct Matrix constructive algorithms, math	2500	x1271
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1664
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9436
1917A	Least Product constructive algorithms, math	800	x24258
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x502
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x584
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x7915
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x16740
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23738
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24599
1915E	Romantic Glasses data structures, greedy, math	1300	x18616
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1678
1914C	Quests greedy, math	1100	x20865
1914B	Preparing for the Contest constructive algorithms, math	800	x28630
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	x775
1912D	Divisibility Test math	1900	x1321
1912B	Blueprint for Seating combinatorics, divide and conquer, math	2100	x926
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x76
1909F2	Small Permutation Problem (Hard Version) combinatorics, dp, math	2500	x833
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1643
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1254
1909D	Split Plus K greedy, math, number theory	1900	x3997
1909C	Heavy Intervals constructive algorithms, data structures, dsu, greedy, math, sortings	1400	x10006
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x14002
1909A	Distinct Buttons implementation, math	800	x15739
1907C	Removal of Unattractive Pairs constructive algorithms, greedy, math, strings	1200	x18483
1906M	Triangle Construction greedy, math	1700	x2335
1906K	Deck-Building Game divide and conquer, math	2500	x264
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x856
1905D	Cyclic MEX data structures, implementation, math, two pointers	2000	x3516
1905A	Constructive Problems constructive algorithms, math	800	x21848
1903E	Geo Game greedy, interactive, math	2000	x1810
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x897
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12321
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6208
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x10738
1901B	Chip and Ribbon greedy, math	1100	x14043
1901A	Line Trip greedy, math	800	x25489
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3730
1900B	Laura and Operations dp, math	900	x16071
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12274
1899A	Game with Integers games, math, number theory	800	x38256
1898D	Absolute Beauty greedy, math	1900	x4757
1898B	Milena and Admirer greedy, math	1500	x10525
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x88
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x79
1896F	Bracket Xoring constructive algorithms, greedy, implementation, math	2600	x653
1896D	Ones and Twos binary search, data structures, divide and conquer, math, two pointers	1700	x5210
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x631
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5591
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10137
1895B	Points and Minimum Distance greedy, math, sortings	800	x19669
1895A	Treasure Chest math	800	x23470
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x775
1891D	Suspicious logarithms binary search, brute force, math	1900	x3718
1891B	Deja Vu brute force, math, sortings	1100	x15889
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x6768
1887D	Split binary search, data structures, divide and conquer, dsu, math, trees, two pointers	2700	x820
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1337
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3335
1886B	Fear of the Dark binary search, geometry, math	1200	x15228
1886A	Sum of Three brute force, constructive algorithms, math	800	x24565
1884E	Hard Design greedy, implementation, math	2800	x264
1884D	Counting Rhyme dp, math, number theory	2100	x2849
1884B	Haunted House binary search, greedy, math, two pointers	1100	x11714
1884A	Simple Design brute force, greedy, math	800	x16493
1883C	Raspberries dp, math	1000	x22861
1883A	Morning math	800	x24033
1881D	Divide and Equalize math, number theory	1300	x14596
1881B	Three Threadlets math	900	x23751
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6622
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x3791