Problemset - Codeforces

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Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)
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Problems

#	Name
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x4400
1904D1	Set To Max (Easy Version) brute force, constructive algorithms, greedy	1600	x6687
1904C	Array Game binary search, brute force, data structures, sortings, two pointers	1400	x12981
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5682
1903C	Theofanis' Nightmare constructive algorithms, greedy	1400	x11860
1902E	Collapsing Strings data structures, strings, trees	1900	x4284
1902D	Robot Queries binary search, data structures, dp, implementation	1900	x4123
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x13703
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6942
1901C	Add, Divide and Floor constructive algorithms, greedy, math	1400	x11916
1900C	Anji's Binary Tree dfs and similar, dp, trees	1300	x11467
1899G	Unusual Entertainment data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers	1900	x3206
1899F	Alex's whims constructive algorithms, graphs, greedy, shortest paths, trees	1600	x7596
1899E	Queue Sort greedy, implementation, sortings	1300	x15430
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x13497
1898D	Absolute Beauty greedy, math	1900	x5249
1898C	Colorful Grid constructive algorithms	1700	x5509
1898B	Milena and Admirer greedy, math	1500	x11851
1896D	Ones and Twos binary search, data structures, divide and conquer, math, two pointers	1700	x5732
1896C	Matching Arrays binary search, constructive algorithms, greedy, sortings	1400	x9583
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x6043
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x11081
1893B	Neutral Tonality constructive algorithms, greedy, sortings, two pointers	1700	x8872
1893A	Anonymous Informant brute force, dfs and similar, graphs, implementation	1400	x12341
1891D	Suspicious logarithms binary search, brute force, math	1900	x3969
1891C	Smilo and Monsters binary search, constructive algorithms, greedy, sortings, two pointers	1500	x13232
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x7348
1889A	Qingshan Loves Strings 2 constructive algorithms, greedy, implementation	1300	x13127
1887B	Time Travel binary search, graphs, shortest paths	1900	x2968
1886C	Decreasing String implementation, strings	1600	x11482
1884C	Medium Design brute force, data structures, dp, greedy, sortings	1700	x6056
1883G2	Dances (Hard Version) binary search, greedy, sortings, two pointers	1900	x5385
1883G1	Dances (Easy version) binary search, greedy, two pointers	1400	x10950
1883F	You Are So Beautiful data structures	1400	x9475
1883E	Look Back bitmasks, greedy	1700	x8083
1883D	In Love data structures, greedy	1500	x11464
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5454
1882C	Card Game brute force, greedy	1500	x12308
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15391
1881F	Minimum Maximum Distance dfs and similar, dp, graphs, shortest paths, trees	1700	x6905
1881E	Block Sequence dp	1500	x14078
1881D	Divide and Equalize math, number theory	1300	x17140
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7379
1879C	Make it Alternating combinatorics, dp, greedy	1300	x16940
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x4108
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x12783
1878D	Reverse Madness data structures, greedy	1600	x8316
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x8270
1875D	Jellyfish and Mex dp	1600	x8653
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11718
1873H	Mad City dfs and similar, dsu, games, graphs, shortest paths, trees	1700	x7362
1873G	ABBC or BACB constructive algorithms, greedy	1500	x13234
1873F	Money Trees binary search, greedy, math, two pointers	1300	x15478
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x6321
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x13558
1870D	Prefix Purchase greedy, implementation, sortings	1800	x6977
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11475
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6968
1868A	Fill in the Matrix constructive algorithms, implementation	1300	x11994
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5770
1867C	Salyg1n and the MEX Game constructive algorithms, data structures, games, greedy, interactive	1300	x11233
1866C	Completely Searching for Inversions dfs and similar, dp, graphs	1900	x3046
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7724
1864D	Matrix Cascade brute force, constructive algorithms, data structures, dp, greedy, math	1700	x6763
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13488
1863D	Two-Colored Dominoes constructive algorithms, greedy	1400	x9504
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6249
1862E	Kolya and Movie Theatre constructive algorithms, data structures, greedy	1600	x10702
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x17183
1861D	Sorting By Multiplication dp, greedy	1800	x6765
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x10121
1860C	Game on Permutation data structures, dp, games, greedy	1400	x13321
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6991
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x11314
1857F	Sum and Product binary search, data structures, math	1600	x11530
1857E	Power of Points math, sortings	1500	x12443
1857D	Strong Vertices math, sortings, trees	1300	x19542
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5308
1856C	To Become Max binary search, brute force, data structures, dp	1600	x12350
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x6999
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x14109
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4468
1852A	Ntarsis' Set binary search, math, number theory	1800	x8052
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5833
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x10333
1851D	Prefix Permutation Sums implementation, math	1300	x15207
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x8200
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x12392
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x19134
1849D	Array Painting constructive algorithms, greedy, two pointers	1700	x8503
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x10522
1848C	Vika and Price Tags math, number theory	1800	x6297
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3780
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12882
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4387
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x3116
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x7029
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x16914
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7823
1845C	Strong Password binary search, dp, greedy, strings	1400	x14261