Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
2 days
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Problems

#	Name
1913A	Rating Increase implementation	800	x22317
1912E	Evaluate It and Back Again constructive algorithms, implementation, math	2200	x774
1912A	Accumulator Apex data structures, implementation, sortings	1900	x1883
1910C	Poisonous Swamp special problem, special problem, implementation, implementation	1600	x583
1910A	Username *special problem, implementation	1100	x1607
1909A	Distinct Buttons implementation, math	800	x15730
1907G	Lights brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	2200	x1754
1907B	YetnotherrokenKeoard data structures, implementation, strings	1000	x23339
1907A	Rook implementation	800	x34175
1905D	Cyclic MEX data structures, implementation, math, two pointers	2000	x3509
1904F	Beautiful Tree data structures, dfs and similar, graphs, implementation, trees	2800	x308
1904E	Tree Queries data structures, dfs and similar, graphs, implementation, trees	2500	x825
1904D2	Set To Max (Hard Version) constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings	1800	x3826
1904A	Forked! brute force, implementation	900	x15946
1902F	Trees and XOR Queries Again data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees	2400	x897
1902D	Robot Queries binary search, data structures, dp, implementation	1900	x3684
1901D	Yet Another Monster Fight binary search, dp, greedy, implementation, math	1700	x6187
1900F	Local Deletions binary search, data structures, implementation	2800	x260
1900E	Transitive Graph dfs and similar, dp, dsu, graphs, implementation	2100	x1834
1900A	Cover in Water constructive algorithms, greedy, implementation, strings	800	x22063
1899E	Queue Sort greedy, implementation, sortings	1300	x13944
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x18148
1898A	Milica and String brute force, implementation, strings	800	x15089
1896G	Pepe Racing constructive algorithms, implementation, interactive, sortings	3200	x308
1896F	Bracket Xoring constructive algorithms, greedy, implementation, math	2600	x653
1895C	Torn Lucky Ticket brute force, dp, hashing, implementation, math	1400	x10120
1894A	Secret Sport implementation, strings	800	x18124
1893C	Freedom of Choice brute force, greedy, implementation	2000	x2443
1893A	Anonymous Informant brute force, dfs and similar, graphs, implementation	1400	x11294
1891E	Brukhovich and Exams brute force, greedy, implementation, math, sortings	2500	x774
1890B	Qingshan Loves Strings constructive algorithms, implementation	800	x16679
1889D	Game of Stacks brute force, dfs and similar, graphs, implementation, trees	3000	x522
1889A	Qingshan Loves Strings 2 constructive algorithms, greedy, implementation	1300	x12049
1886C	Decreasing String implementation, strings	1600	x10258
1884E	Hard Design greedy, implementation, math	2800	x264
1881C	Perfect Square brute force, implementation	1200	x15866
1879E	Interactive Game with Coloring brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees	2400	x1183
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1098
1874A	Jellyfish and Game brute force, games, greedy, implementation	1200	x15822
1873D	1D Eraser greedy, implementation, two pointers	800	x32777
1873C	Target Practice implementation, math	800	x35490
1873A	Short Sort brute force, implementation	800	x48987
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x5821
1872B	The Corridor or There and Back Again greedy, implementation	900	x26663
1870D	Prefix Purchase greedy, implementation, sortings	1800	x6440
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x10746
1868F	LIS? data structures, greedy, implementation	3500	x69
1868D	Flower-like Pseudotree constructive algorithms, graphs, greedy, implementation, trees	3000	x248
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1076
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2277
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6463
1868A	Fill in the Matrix constructive algorithms, implementation	1300	x11178
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5337
1866K	Keen Tree Calculation binary search, data structures, dp, geometry, graphs, implementation, trees	2500	x412
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x252
1864F	Exotic Queries data structures, implementation, sortings	2300	x1316
1864A	Increasing and Decreasing constructive algorithms, greedy, implementation, math	800	x19779
1863C	MEX Repetition implementation, math	1100	x13402
1863A	Channel greedy, implementation	800	x17447
1862C	Flower City Fence binary search, data structures, implementation, sortings	1100	x19677
1862A	Gift Carpet dp, greedy, implementation, strings	800	x30831
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1628
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x9481
1860F	Evaluate RBS data structures, geometry, implementation, math, sortings	2900	x265
1857B	Maximum Rounding greedy, implementation, math	1100	x22147
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1314
1856B	Good Arrays implementation, math	900	x23166
1856A	Tales of a Sort implementation	800	x25816
1851G	Vlad and the Mountains binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers	2000	x2937
1851D	Prefix Permutation Sums implementation, math	1300	x14387
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x7530
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11254
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x17258
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x20929
1850D	Balanced Round brute force, greedy, implementation, sortings	900	x32520
1850C	Word on the Paper implementation, strings	800	x41238
1850B	Ten Words of Wisdom implementation, sortings	800	x40511
1850A	To My Critics implementation, sortings	800	x51294
1849A	Morning Sandwich implementation, math	800	x27074
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x745
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x13414
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x317
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3604
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x2879
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x6602
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x15408
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x26115
1846A	Rudolph and Cut the Rope implementation, math	800	x31412
1845E	Boxes and Balls dp, implementation, math	2500	x1271
1845B	Come Together geometry, implementation, math	900	x20902
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24654
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x644
1844C	Particles dp, greedy, implementation, math	1300	x14844
1841B	Keep it Beautiful implementation	1000	x20587
1840E	Character Blocking data structures, hashing, implementation	1600	x7553
1840A	Cipher Shifer implementation, strings, two pointers	800	x32646
1839A	The Good Array greedy, implementation, math	800	x17102
1837F	Editorial for Two binary search, data structures, greedy, implementation	2400	x2074
1836A	Destroyer implementation, sortings	800	x19797
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x144