Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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bitmasks

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Problems

#	Name
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x372
201D	Brand New Problem bitmasks, brute force, dp	2600	x387
1906B	Button Pressing bitmasks, constructive algorithms, hashing	2600	x450
375C	Circling Round Treasures bitmasks, shortest paths	2600	x469
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x478
1679F	Formalism for Formalism bitmasks, dp, math	2600	x492
1739F	Keyboard Design bitmasks, data structures, dp, string suffix structures, strings	2600	x505
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x607
599E	Sandy and Nuts bitmasks, dp, trees	2600	x614
1004F	Sonya and Bitwise OR bitmasks, data structures, divide and conquer	2600	x689
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x744
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x759
1398G	Running Competition bitmasks, fft, math, number theory	2600	x759
1569E	Playoff Restoration bitmasks, brute force, hashing, implementation, meet-in-the-middle	2600	x782
1326F1	Wise Men (Easy Version) bitmasks, brute force, dp, meet-in-the-middle	2600	x804
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x831
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x858
482C	Game with Strings bitmasks, dp, probabilities	2600	x868
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x886
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x890
1835C	Twin Clusters bitmasks, brute force, constructive algorithms, math, probabilities	2600	x924
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x989
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x989
1815D	XOR Counting bitmasks, combinatorics, dp, math	2600	x1017
755F	PolandBall and Gifts bitmasks, dp, greedy	2600	x1232
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1935
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x2084
845F	Guards In The Storehouse bitmasks, dp	2500	x413
152E	Garden bitmasks, dp, graphs, trees	2500	x456
1117F	Crisp String bitmasks, dp	2500	x511
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x522
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x655
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x696
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x732
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x764
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x776
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x792
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x823
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x833
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x845
1917F	Construct Tree bitmasks, constructive algorithms, dp, trees	2500	x880
53E	Dead Ends bitmasks, dp	2500	x896
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x946
1716E	Swap and Maximum Block bitmasks, data structures, dfs and similar, divide and conquer, dp	2500	x1014
333E	Summer Earnings binary search, bitmasks, brute force, geometry, sortings	2500	x1065
1313D	Happy New Year bitmasks, dp, implementation	2500	x1099
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1143
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1157
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1211
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1212
1583F	Defender of Childhood Dreams bitmasks, constructive algorithms, divide and conquer	2500	x1213
1479C	Continuous City bitmasks, constructive algorithms	2500	x1252
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1256
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1265
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1275
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1287
543C	Remembering Strings bitmasks, dp	2500	x1345
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1373
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1415
1665E	MinimizOR bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers	2500	x1416
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1436
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1478
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1599
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1844
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2041
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2164
986C	AND Graph bitmasks, dfs and similar, dsu, graphs	2500	x2180
107C	Arrangement bitmasks, dp	2400	x360
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x428
534F	Simplified Nonogram bitmasks, dp, hashing, meet-in-the-middle	2400	x435
354B	Game with Strings bitmasks, dp, games	2400	x447
367D	Sereja and Sets bitmasks, dfs and similar	2400	x615
1163E	Magical Permutation bitmasks, brute force, constructive algorithms, data structures, graphs, math	2400	x642
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x657
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x666
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x727
913E	Logical Expression bitmasks, dp, shortest paths	2400	x741
1009G	Allowed Letters bitmasks, flows, graph matchings, graphs, greedy	2400	x764
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x765
21D	Traveling Graph bitmasks, graph matchings, graphs	2400	x782
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x806
1146E	Hot is Cold bitmasks, data structures, divide and conquer, implementation	2400	x820
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x850
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x912
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x920
1038E	Maximum Matching bitmasks, brute force, dfs and similar, dp, graphs	2400	x950
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x998
780F	Axel and Marston in Bitland bitmasks, dp, graphs, matrices	2400	x1017
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1047
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1089
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1121
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1148
1739E	Cleaning Robot bitmasks, dp	2400	x1159
906C	Party bitmasks, brute force, dp, graphs	2400	x1177
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1224
698C	LRU bitmasks, dp, math, probabilities	2400	x1271
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1309
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1318
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1351
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x1369