Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
09:52:39
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Before contest
Codeforces Round 941 (Div. 2)
09:52:39
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combinatorics

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Problems

#	Name
712D	Memory and Scores combinatorics, dp, math	2200	x1611
1811G2	Vlad and the Nice Paths (hard version) binary search, combinatorics, data structures, dp, math, two pointers	2200	x1608
612E	Square Root of Permutation combinatorics, constructive algorithms, dfs and similar, graphs, math	2200	x1578
815B	Karen and Test brute force, combinatorics, constructive algorithms, math	2200	x1361
1808E1	Minibuses on Venus (easy version) combinatorics, divide and conquer, dp	2200	x1246
272E	Dima and Horses combinatorics, constructive algorithms, graphs	2200	x1171
1666F	Fancy Stack combinatorics, dp, implementation	2200	x1103
28C	Bath Queue combinatorics, dp, probabilities	2200	x981
1906H	Twin Friends combinatorics, dp	2200	x600
852F	Product transformation combinatorics, math, number theory	2200	x542
305D	Olya and Graph combinatorics, math	2200	x452
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3213
1342E	Placing Rooks combinatorics, fft, math	2300	x2804
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2701
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2640
1228E	Another Filling the Grid combinatorics, dp, math	2300	x2488
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2483
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2479
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x2374
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2337
1371E2	Asterism (Hard Version) binary search, combinatorics, dp, math, number theory, sortings	2300	x2292
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2037
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x1977
1292C	Xenon's Attack on the Gangs combinatorics, dfs and similar, dp, greedy, trees	2300	x1867
960E	Alternating Tree combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees	2300	x1807
570E	Pig and Palindromes combinatorics, dp	2300	x1801
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1779
1768E	Partial Sorting combinatorics, math, number theory	2300	x1768
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x1715
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1643
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1605
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1605
1204E	Natasha, Sasha and the Prefix Sums combinatorics, dp, math, number theory	2300	x1575
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1567
1276C	Beautiful Rectangle brute force, combinatorics, constructive algorithms, data structures, greedy, math	2300	x1463
1197E	Culture Code binary search, combinatorics, data structures, dp, shortest paths, sortings	2300	x1452
1738E	Balance Addicts combinatorics, dp, math, two pointers	2300	x1449
1167F	Scalar Queries combinatorics, data structures, math, sortings	2300	x1432
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1409
1942E	Farm Game combinatorics, games	2300	x1398
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
660E	Different Subsets For All Tuples combinatorics, math	2300	x1226
938E	Max History combinatorics, math	2300	x1223
1914G2	Light Bulbs (Hard Version) combinatorics, data structures, dfs and similar, dp, graphs, hashing	2300	x1209
1151F	Sonya and Informatics combinatorics, dp, matrices, probabilities	2300	x1139
403D	Beautiful Pairs of Numbers combinatorics, dp	2300	x1061
1065E	Side Transmutations combinatorics, strings	2300	x1017
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x998
629E	Famil Door and Roads combinatorics, data structures, dfs and similar, dp, probabilities, trees	2300	x966
659G	Fence Divercity combinatorics, dp, number theory	2300	x947
91C	Ski Base combinatorics, dsu, graphs	2300	x854
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x851
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x802
111D	Petya and Coloring combinatorics, dp	2300	x713
123C	Brackets combinatorics, dp, greedy	2300	x588
37D	Lesson Timetable combinatorics, dp, math	2300	x387
518F	Pasha and Pipe binary search, brute force, combinatorics, dp, implementation	2300	x347
44I	Toys brute force, combinatorics	2300	x181
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4059
932E	Team Work combinatorics, dp, math	2400	x2680
1628D2	Game on Sum (Hard Version) combinatorics, dp, games, math	2400	x1969
1485F	Copy or Prefix Sum combinatorics, data structures, dp, sortings	2400	x1862
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1822
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x1723
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1513
1227F2	Wrong Answer on test 233 (Hard Version) combinatorics, math	2400	x1458
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1443
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1405
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1357
1726E	Almost Perfect combinatorics, fft, math	2400	x1349
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1346
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1291
1109D	Sasha and Interesting Fact from Graph Theory brute force, combinatorics, dp, math, trees	2400	x1264
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1243
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1184
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1180
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1149
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1135
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1093
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1063
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1016
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x974
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x974
886E	Maximum Element combinatorics, dp, math	2400	x972
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x965
1784D	Wooden Spoon combinatorics, dp	2400	x948
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x921
1817C	Similar Polynomials combinatorics, math	2400	x918
1670F	Jee, You See? bitmasks, combinatorics, dp	2400	x915
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x855
1905E	One-X combinatorics, dfs and similar, dp, math, trees	2400	x840
26D	Tickets combinatorics, math, probabilities	2400	x745
837F	Prefix Sums binary search, brute force, combinatorics, math, matrices	2400	x734
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x685
288D	Polo the Penguin and Trees combinatorics, dfs and similar, trees	2400	x671
295D	Greg and Caves combinatorics, dp	2400	x634
946F	Fibonacci String Subsequences combinatorics, dp, matrices	2400	x528
856C	Eleventh Birthday combinatorics, dp, math	2400	x522
51E	Pentagon combinatorics, graphs, matrices	2400	x363