Problemset - Codeforces

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

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Difficulty: —

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Problems

#	Name
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x194
1893D	Colorful Constructive constructive algorithms, data structures, greedy	2600	x895
1893C	Freedom of Choice brute force, greedy, implementation	2000	x2673
1893B	Neutral Tonality constructive algorithms, greedy, sortings, two pointers	1700	x8852
1893A	Anonymous Informant brute force, dfs and similar, graphs, implementation	1400	x12321
1891F	A Growing Tree data structures, dfs and similar, trees	2000	x3715
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x826
1891D	Suspicious logarithms binary search, brute force, math	1900	x3962
1891C	Smilo and Monsters binary search, constructive algorithms, greedy, sortings, two pointers	1500	x13171
1891B	Deja Vu brute force, math, sortings	1100	x17904
1891A	Sorting with Twos constructive algorithms, sortings	800	x19196
1890B	Qingshan Loves Strings constructive algorithms, implementation	800	x17494
1890A	Doremy's Paint 3 constructive algorithms	800	x26485
1889F	Doremy's Average Tree data structures, dp, greedy, trees	3500	x79
1889E	Doremy's Swapping Trees dfs and similar, graphs, trees	3500	x110
1889D	Game of Stacks brute force, dfs and similar, graphs, implementation, trees	3000	x581
1889C2	Doremy's Drying Plan (Hard Version) data structures, dp	2600	x976
1889C1	Doremy's Drying Plan (Easy Version) brute force, data structures, dp, greedy, sortings	2000	x3252
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x7330
1889A	Qingshan Loves Strings 2 constructive algorithms, greedy, implementation	1300	x13100
1887F	Minimum Segments constructive algorithms	3400	x129
1887E	Good Colorings binary search, constructive algorithms, graphs, interactive	3100	x370
1887D	Split binary search, data structures, divide and conquer, dsu, math, trees, two pointers	2700	x873
1887C	Minimum Array binary search, brute force, constructive algorithms, data structures, greedy, hashing, two pointers	2400	x1714
1887B	Time Travel binary search, graphs, shortest paths	1900	x2964
1886F	Diamond Theft data structures, greedy	3300	x190
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1456
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3571
1886C	Decreasing String implementation, strings	1600	x11454
1886B	Fear of the Dark binary search, geometry, math	1200	x16122
1886A	Sum of Three brute force, constructive algorithms, math	800	x25782
1885A	Deterministic Scheduling for Extended Reality over 5G and Beyond *special problem
1884E	Hard Design greedy, implementation, math	2800	x317
1884D	Counting Rhyme dp, math, number theory	2100	x3190
1884C	Medium Design brute force, data structures, dp, greedy, sortings	1700	x6041
1884B	Haunted House binary search, greedy, math, two pointers	1100	x12641
1884A	Simple Design brute force, greedy, math	800	x17399
1883G2	Dances (Hard Version) binary search, greedy, sortings, two pointers	1900	x5370
1883G1	Dances (Easy version) binary search, greedy, two pointers	1400	x10909
1883F	You Are So Beautiful data structures	1400	x9454
1883E	Look Back bitmasks, greedy	1700	x8064
1883D	In Love data structures, greedy	1500	x11434
1883C	Raspberries dp, math	1000	x27258
1883B	Chemistry strings	900	x31928
1883A	Morning math	800	x25587
1882E2	Two Permutations (Hard Version) constructive algorithms	3100	x291
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x1016
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x5444
1882C	Card Game brute force, greedy	1500	x12284
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x15367
1882A	Increasing Sequence greedy	800	x25298
1881G	Anya and the Mysterious String binary search, data structures	2000	x2365
1881F	Minimum Maximum Distance dfs and similar, dp, graphs, shortest paths, trees	1700	x6887
1881E	Block Sequence dp	1500	x14011
1881D	Divide and Equalize math, number theory	1300	x17073
1881C	Perfect Square brute force, implementation	1200	x17040
1881B	Three Threadlets math	900	x25337
1881A	Don't Try to Count brute force, strings	800	x31737
1879F	Last Man Standing brute force, data structures, number theory	2800	x509
1879E	Interactive Game with Coloring brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees	2400	x1262
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7348
1879C	Make it Alternating combinatorics, dp, greedy	1300	x16894
1879B	Chips on the Board constructive algorithms, greedy	900	x22401
1879A	Rigged! greedy	800	x23110
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1180
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x4103
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x12725
1878D	Reverse Madness data structures, greedy	1600	x8298
1878C	Vasilije in Cacak math	900	x32768
1878B	Aleksa and Stack constructive algorithms, math	800	x31366
1878A	How Much Does Daytona Cost? greedy	800	x44159
1877C	Joyboard math, number theory	1200	x10916
1877A	Goals of Victory math	800	x23174
1876G	Clubstep binary search, brute force, data structures, greedy, trees	3500	x124
1876F	Indefinite Clownfish binary search, graphs	3500	x133
1876E	Ball-Stackable constructive algorithms, data structures, dp, trees	3300	x267
1876D	Lexichromatography combinatorics, dfs and similar, dsu, graphs, two pointers	2500	x873
1876C	Autosynthesis constructive algorithms, dfs and similar, graphs, greedy, sortings	2100	x2282
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x8239
1876A	Helmets in Night Light greedy, sortings	1000	x17661
1875D	Jellyfish and Mex dp	1600	x8629
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x11704
1875A	Jellyfish and Undertale brute force, greedy	900	x25286
1874G	Jellyfish and Inscryption dp	3500	x85
1874F	Jellyfish and OEIS dp	3500	x207
1874E	Jellyfish and Hack dp, math	3000	x314
1874D	Jellyfish and Miku divide and conquer, dp, math, probabilities	2800	x724
1874C	Jellyfish and EVA dp, graphs, greedy, math, probabilities	2300	x1702
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1142
1874A	Jellyfish and Game brute force, games, greedy, implementation	1200	x17001
1873H	Mad City dfs and similar, dsu, games, graphs, shortest paths, trees	1700	x7350
1873G	ABBC or BACB constructive algorithms, greedy	1500	x13184
1873F	Money Trees binary search, greedy, math, two pointers	1300	x15429
1873E	Building an Aquarium binary search, sortings	1100	x26542
1873D	1D Eraser greedy, implementation, two pointers	800	x34947
1873C	Target Practice implementation, math	800	x40385
1873B	Good Kid brute force, greedy, math	800	x48340
1873A	Short Sort brute force, implementation	800	x53660
1872G	Replace With Product brute force, greedy, math	2000	x4259
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x6314