Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round #581 (Div. 2)
36:04:23

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1206A	Choose Two Numbers math	800	x7587
1205F	Beauty of a Permutation constructive algorithms, math	3400	x4
1205A	Almost Equal constructive algorithms, greedy, math	1300	x5988
1203C	Common Divisors implementation, math	1300	x6695
1203B	Equal Rectangles greedy, math	1200	x6797
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2500	x414
1200C	Round Corridor math, number theory	1500	x5248
1202F	You Are Given Some Letters... binary search, implementation, math	2800	x113
1202D	Print a 1337-string... combinatorics, constructive algorithms, math, strings	1900	x2177
1202C	You Are Given a WASD-string... brute force, data structures, dp, greedy, implementation, math, strings	2100	x1065
1201C	Maximum Median binary search, greedy, math, sortings	1400	x5350
1201B	Zero Array greedy, math	1500	x6129
1199B	Water Lily geometry, math	1000	x8992
1193A	Amusement Park *special problem, dp, math		x66
1196B	Odd Sum Segments constructive algorithms, math	1200	x7901
1196A	Three Piles of Candies brute force, constructive algorithms, math	700	x12039
1197D	Yet Another Subarray Problem dp, greedy, math	1900	x2555
1197A	DIY Wooden Ladder greedy, math, sortings	1000	x8579
1195F	Geometers Anonymous Club data structures, geometry, math, sortings	2700	x279
1195D2	Submarine in the Rybinsk Sea (hard edition) combinatorics, math, number theory	1700	x2714
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x4811
1195B	Sport Mafia binary search, brute force, math	1100	x8325
1195A	Drinks Choosing greedy, math	1100	x7798
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1600	x3753
1178C	Tiles combinatorics, greedy, math	1300	x5517
1194D	1-2-K Game games, math	1700	x3353
1194A	Remove a Progression math	800	x9214
1184D2	Parallel Universes (Hard) math, matrices	3300	x17
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x38
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x2650
1188B	Count Pairs math, matrices, number theory, two pointers	2200	x2063
1189C	Candies! data structures, dp, implementation, math	1400	x5491
1189B	Number Circle greedy, math, sortings	1100	x7132
1187F	Expected Square Beauty dp, math, probabilities	2600	x297
1187A	Stickers and Toys math	900	x9072
1186E	Vus the Cossack and a Field divide and conquer, implementation, math	2500	x328
1186D	Vus the Cossack and Numbers constructive algorithms, greedy, math	1600	x4927
1186C	Vus the Cossack and Strings implementation, math	1800	x3535
1183F	Topforces Strikes Back brute force, math, sortings	2400	x863
1183C	Computer Game binary search, math	1400	x6129
1183B	Equalize Prices math	1000	x9601
1180A	Alex and a Rhombus dp, implementation, math	800	x9208
1179C	Serge and Dining Room binary search, data structures, graph matchings, greedy, implementation, math, trees	2400	x886
1185D	Extra Element implementation, math	1700	x3725
1185C2	Exam in BerSU (hard version) brute force, data structures, greedy, math	1700	x4194
1185A	Ropewalkers math	900	x9431
1181A	Chunga-Changa greedy, math	1000	x7346
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2200	x1216
1182A	Filling Shapes dp, math	1000	x9371
1176B	Merge it! math	1100	x8337
1175F	The Number of Subpermutations brute force, data structures, divide and conquer, hashing, math	2600	x416
1175A	From Hero to Zero implementation, math	1000	x8947
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x524
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3100	x73
1148E	Earth Wind and Fire constructive algorithms, greedy, math, sortings, two pointers	2300	x1002
1170A	Three Integers Again *special problem, math		x944
1169A	Circle Metro implementation, math	1000	x7299
1168E	Xor Permutations constructive algorithms, math	3100	x57
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2000	x1565
1166D	Cute Sequences binary search, brute force, greedy, math	2100	x1258
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x7009
1167F	Scalar Queries combinatorics, data structures, math, sortings	2300	x692
1167B	Lost Numbers brute force, divide and conquer, interactive, math	1400	x4838
1165E	Two Arrays and Sum of Functions greedy, math, sortings	1800	x3181
1165D	Almost All Divisors math, number theory	1600	x4919
1165A	Remainder implementation, math	1200	x7533
1159B	Expansion coefficient of the array implementation, math	1300	x4317
1159A	A pile of stones implementation, math	800	x6684
1158F	Density of subarrays dp, math	3400	x64
1158E	Strange device binary search, interactive, math, trees	3300	x35
1158D	Winding polygonal line constructive algorithms, geometry, greedy, math	2800	x303
1158C	Permutation recovery constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings	2300	x857
1158B	The minimal unique substring constructive algorithms, math, strings	2200	x1201
1158A	The Party and Sweets binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers	1500	x3624
1163E	Magical Permutation bitmasks, brute force, constructive algorithms, data structures, graphs, math	2800	x247
1163C2	Power Transmission (Hard Edition) data structures, geometry, implementation, math	2000	x1831
1163A	Eating Soup greedy, math	1000	x7192
1156F	Card Bag dp, math, probabilities	2500	x480
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1300	x6986
1157D	N Problems During K Days constructive algorithms, greedy, math	2100	x1698
1152C	Neko does Maths brute force, math, number theory	1800	x3244
1152B	Neko Performs Cat Furrier Transform bitmasks, constructive algorithms, dfs and similar, math	1300	x5263
1152A	Neko Finds Grapes greedy, implementation, math	800	x8633
1155E	Guess the Root brute force, interactive, math	2200	x762
1155C	Alarm Clocks Everywhere math, number theory	1300	x5478
1146D	Frog Jumping dfs and similar, math, number theory	2100	x732
1151E	Number of Components combinatorics, data structures, dp, math	2100	x1443
1151D	Stas and the Queue at the Buffet greedy, math, sortings	1500	x4497
1151C	Problem for Nazar constructive algorithms, math	1700	x2982
1154G	Minimum Possible LCM brute force, greedy, math, number theory	2400	x1219
1154C	Gourmet Cat implementation, math	1400	x5686
1154B	Make Them Equal math	1200	x8397
1154A	Restoring Three Numbers math	600	x13416
1153F	Serval and Bonus Problem combinatorics, dp, math, probabilities	2800	x314
1153A	Serval and Bus brute force, math	1100	x7521
1119H	Triple fft, math	3100	x107
1119C	Ramesses and Corner Inversion constructive algorithms, greedy, implementation, math	1500	x4557
1144E	Median String bitmasks, math, number theory, strings	1900	x2305
1143B	Nirvana brute force, math, number theory	1300	x5656
1142B	Lynyrd Skynyrd data structures, dfs and similar, dp, math, trees	2300	x1195

←