Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
10:24:25
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bitmasks

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Problems

#	Name
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory		x3658
1957D	A BIT of an Inequality bitmasks, brute force, dp, math		x3180
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation		x13770
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x2925
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x928
1952I	Dark Matter bitmasks, geometry		x326
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3297
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7233
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x582
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x3910
1944B	Equal XOR bitmasks, constructive algorithms	1100	x13967
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x404
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6477
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1149
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1169
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3022
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x852
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x601
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2341
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1480
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1452
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9822
1926D	Vlad and Division bitmasks, greedy	1300	x13340
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x6982
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x12436
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x889
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x38178
1915A	Odd One Out bitmasks, implementation	800	x49137
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x13546
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x1995
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1240
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13711
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x453
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x702
1903D1	Maximum And Queries (easy version) binary search, bitmasks, brute force, greedy	1700	x5025
1903B	StORage room bitmasks, brute force, constructive algorithms, greedy	1200	x11252
1900D	Small GCD bitmasks, brute force, dp, math, number theory	2000	x3671
1895D	XOR Construction bitmasks, constructive algorithms, data structures, math, string suffix structures, trees	1900	x5540
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1320
1883E	Look Back bitmasks, greedy	1700	x6982
1882D	Tree XOR bitmasks, dfs and similar, dp, greedy, trees	1900	x4945
1882B	Sets and Union bitmasks, brute force, constructive algorithms, greedy	1300	x14212
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6536
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1088
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x10935
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10742
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1058
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x11819
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2196
1870B	Friendly Arrays bitmasks, greedy, math	1200	x13293
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2264
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6413
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x15767
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2459
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12546
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1026
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x5624
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x146
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1301
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3319
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x5275
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x650
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1444
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x851
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x12181
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x19034
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4031
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x637
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x30978
1842H	Tenzing and Random Real Numbers bitmasks, dp, graphs, math, probabilities	3000	x557
1842B	Tenzing and Books bitmasks, greedy, math	1100	x15572
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21424
1835F	Good Graph bitmasks, dfs and similar, graph matchings, graphs, implementation	3500	x137
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x935
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x7017
1829C	Mr. Perfectly Fine bitmasks, greedy, implementation	800	x26992
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1494
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1030
1807G2	Subsequence Addition (Hard Version) bitmasks, dp, greedy, implementation, sortings	1100	x17612
1805A	We Need the Zero bitmasks, brute force	800	x20901
1804H	Code Lock bitmasks, dp	3300	x169
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1354
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x8089
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x3673
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x270
1795G	Removal Sequences bitmasks, dfs and similar, graphs	2700	x646
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5864
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x14123
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x511
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1565
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x784
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2172
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1368
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4634
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1214
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x813
1778C	Flexible String bitmasks, brute force, strings	1600	x7628
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x814
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3204
1775C	Interesting Sequence bitmasks, math	1600	x9608

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