Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
39:36:50
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bitmasks

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Problems

#	Name
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2194
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x1977
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x1964
1093G	Multidimensional Queries bitmasks, data structures	2300	x1820
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x1715
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1553
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1478
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1426
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1368
327E	Axis Walking bitmasks, combinatorics, constructive algorithms, dp, meet-in-the-middle	2300	x1340
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1088
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x920
429C	Guess the Tree bitmasks, constructive algorithms, dp, greedy, trees	2300	x900
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x851
212B	Polycarpus is Looking for Good Substrings bitmasks, hashing, implementation	2300	x321
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4061
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x2427
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2076
959F	Mahmoud and Ehab and yet another xor task bitmasks, dp, math, matrices	2400	x1937
1257F	Make Them Similar bitmasks, brute force, hashing, meet-in-the-middle	2400	x1927
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1849
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1835
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1808
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1726
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1542
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1510
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1493
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x1465
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1444
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x1376
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1354
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1322
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1320
698C	LRU bitmasks, dp, math, probabilities	2400	x1274
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1234
906C	Party bitmasks, brute force, dp, graphs	2400	x1179
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1168
1739E	Cleaning Robot bitmasks, dp	2400	x1165
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1147
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1093
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1058
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1018
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x1002
1038E	Maximum Matching bitmasks, brute force, dfs and similar, dp, graphs	2400	x951
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x922
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x915
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x856
1146E	Hot is Cold bitmasks, data structures, divide and conquer, implementation	2400	x822
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x814
21D	Traveling Graph bitmasks, graph matchings, graphs	2400	x787
1009G	Allowed Letters bitmasks, flows, graph matchings, graphs, greedy	2400	x767
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x766
913E	Logical Expression bitmasks, dp, shortest paths	2400	x743
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x731
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x670
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x658
1163E	Magical Permutation bitmasks, brute force, constructive algorithms, data structures, graphs, math	2400	x644
367D	Sereja and Sets bitmasks, dfs and similar	2400	x616
354B	Game with Strings bitmasks, dp, games	2400	x448
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x438
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x429
107C	Arrangement bitmasks, dp	2400	x361
986C	AND Graph bitmasks, dfs and similar, dsu, graphs	2500	x2185
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2175
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2045
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1845
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1602
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1481
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1438
1665E	MinimizOR bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers	2500	x1421
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1417
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1378
543C	Remembering Strings bitmasks, dp	2500	x1350
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1291
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1277
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1268
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1259
1479C	Continuous City bitmasks, constructive algorithms	2500	x1256
1583F	Defender of Childhood Dreams bitmasks, constructive algorithms, divide and conquer	2500	x1220
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1214
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1213
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1161
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1145
1313D	Happy New Year bitmasks, dp, implementation	2500	x1106
333E	Summer Earnings binary search, bitmasks, brute force, geometry, sortings	2500	x1066
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1020
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x958
53E	Dead Ends bitmasks, dp	2500	x898
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x887
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x850
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x842
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x830
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x813
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x783
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x766
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x733
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x702
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x659
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x531
1117F	Crisp String bitmasks, dp	2500	x517