Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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bitmasks

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Problems

#	Name
757D	Felicity's Big Secret Revealed bitmasks, dp	2200	x1267
755F	PolandBall and Gifts bitmasks, dp, greedy	2600	x1267
698C	LRU bitmasks, dp, math, probabilities	2400	x1273
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1277
425B	Sereja and Table bitmasks, greedy	2200	x1280
309C	Memory for Arrays binary search, bitmasks, greedy	1900	x1286
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1290
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1301
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1319
1886E	I Wanna be the Team Leader bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers	2400	x1320
327E	Axis Walking bitmasks, combinatorics, constructive algorithms, dp, meet-in-the-middle	2300	x1340
543C	Remembering Strings bitmasks, dp	2500	x1346
1804E	Routing bitmasks, brute force, dfs and similar, dp, graphs	2400	x1354
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1366
850C	Arpa and a game with Mojtaba bitmasks, dp, games	2200	x1368
914E	Palindromes in a Tree bitmasks, data structures, divide and conquer, trees	2400	x1374
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1378
232B	Table bitmasks, combinatorics, dp, math	1900	x1386
1741G	Kirill and Company bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths	2200	x1408
914F	Substrings in a String bitmasks, brute force, data structures, string suffix structures, strings	3000	x1416
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1417
1665E	MinimizOR bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers	2500	x1421
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1426
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1438
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1439
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1441
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1442
1659E	AND-MEX Walk bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2200	x1456
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x1465
743E	Vladik and cards binary search, bitmasks, brute force, dp	2200	x1468
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1469
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1471
993C	Careful Maneuvering bitmasks, brute force, geometry	2100	x1478
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1480
379D	New Year Letter bitmasks, brute force, dp	2000	x1482
1826E	Walk the Runway bitmasks, brute force, data structures, dp, graphs, implementation, sortings	2400	x1493
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1506
513C	Second price auction bitmasks, probabilities	2000	x1516
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1541
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1553
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1559
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1586
1327F	AND Segments bitmasks, combinatorics, data structures, dp, two pointers	2500	x1601
855E	Salazar Slytherin's Locket bitmasks, dp	2200	x1606
1670E	Hemose on the Tree bitmasks, constructive algorithms, dfs and similar, trees	2200	x1661
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1663
916B	Jamie and Binary Sequence (changed after round) bitmasks, greedy, math	2000	x1668
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1670
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1681
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1706
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x1715
1720D2	Xor-Subsequence (hard version) bitmasks, data structures, dp, strings, trees	2400	x1723
1194E	Count The Rectangles bitmasks, brute force, data structures, geometry, sortings	2200	x1729
1185F	Two Pizzas bitmasks, brute force	2100	x1799
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1808
1093G	Multidimensional Queries bitmasks, data structures	2300	x1819
1622E	Math Test bitmasks, brute force, greedy	2200	x1829
1615D	X(or)-mas Tree bitmasks, dfs and similar, dsu, graphs, trees	2200	x1835
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1835
333D	Characteristics of Rectangles binary search, bitmasks, brute force, implementation, sortings	2100	x1844
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1845
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1849
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x1896
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1898
1257F	Make Them Similar bitmasks, brute force, hashing, meet-in-the-middle	2400	x1926
993B	Open Communication bitmasks, brute force	1900	x1928
959F	Mahmoud and Ehab and yet another xor task bitmasks, dp, math, matrices	2400	x1936
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1939
1625D	Binary Spiders bitmasks, data structures, implementation, math, sortings, trees	2300	x1963
1912K	Kim's Quest bitmasks, combinatorics, dp	1800	x1965
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x1967
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x1977
981E	Addition on Segments bitmasks, data structures, divide and conquer, dp	2200	x1991
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2044
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2075
1208F	Bits And Pieces bitmasks, dfs and similar, dp, greedy	2600	x2092
442A	Borya and Hanabi bitmasks, brute force, implementation	1700	x2092
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2103
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2169
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2170
986C	AND Graph bitmasks, dfs and similar, dsu, graphs	2500	x2183
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2191
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2208
1476E	Pattern Matching bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings	2300	x2238
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2253
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2259
1168C	And Reachability bitmasks, dp	2200	x2321
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2337
1234F	Yet Another Substring Reverse bitmasks, dp	2200	x2355
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x2371
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x2373
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x2422
1658D2	388535 (Hard Version) bitmasks, brute force, data structures, math	2300	x2430
388B	Fox and Minimal path bitmasks, constructive algorithms, graphs, implementation, math	1900	x2431
1732C2	Sheikh (Hard Version) binary search, bitmasks, brute force, greedy, implementation, two pointers	2100	x2451
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2459
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x2551
513B2	Permutations bitmasks, divide and conquer, math	1800	x2561
707D	Persistent Bookcase bitmasks, data structures, dfs and similar, implementation	2200	x2592
768E	Game of Stones bitmasks, dp, games	2100	x2626