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Before contest
Codeforces Round 941 (Div. 1)
2 days
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
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greedy
combine-tags-by-or
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
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strings
ternary search
trees
two pointers
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Problems
#
Name
1251D
Salary Changing
binary search
,
greedy
,
sortings
1900
x5609
1268B
Domino for Young
dp
,
greedy
,
math
2000
x5605
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x5593
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x5587
1000B
Light It Up
greedy
1500
x5581
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5576
798C
Mike and gcd problem
dp
,
greedy
,
number theory
1700
x5575
815A
Karen and Game
brute force
,
greedy
,
implementation
1700
x5571
985C
Liebig's Barrels
greedy
1500
x5570
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5567
203C
Photographer
greedy
,
sortings
1400
x5566
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5547
712C
Memory and De-Evolution
greedy
,
math
1600
x5528
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5519
1624G
MinOr Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x5515
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5515
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5506
1082C
Multi-Subject Competition
greedy
,
sortings
1600
x5499
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5489
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5467
1312E
Array Shrinking
dp
,
greedy
2100
x5465
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5464
858C
Did you mean...
dp
,
greedy
,
implementation
1500
x5441
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5440
1799C
Double Lexicographically Minimum
greedy
,
strings
1700
x5431
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5425
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5425
732D
Exams
binary search
,
greedy
,
sortings
1700
x5401
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5397
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5384
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5383
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5381
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5362
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5356
1765K
Torus Path
greedy
,
math
1500
x5351
215B
Olympic Medal
greedy
,
math
1300
x5350
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5348
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5334
1294F
Three Paths on a Tree
dfs and similar
,
dp
,
greedy
,
trees
2000
x5334
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5305
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x5300
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x5295
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5285
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5284
196A
Lexicographically Maximum Subsequence
greedy
,
strings
1100
x5282
186B
Growing Mushrooms
greedy
,
sortings
1200
x5281
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5263
412B
Network Configuration
greedy
,
sortings
900
x5258
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5251
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5237
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x5223
1494C
1D Sokoban
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5223
383A
Milking cows
data structures
,
greedy
1600
x5196
1009C
Annoying Present
greedy
,
math
1700
x5184
949A
Zebras
greedy
1600
x5176
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5156
1031C
Cram Time
greedy
1600
x5156
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5125
1176D
Recover it!
dfs and similar
,
graphs
,
greedy
,
number theory
,
sortings
1800
x5124
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5121
578B
"Or" Game
brute force
,
greedy
1700
x5110
1197D
Yet Another Subarray Problem
dp
,
greedy
,
math
1900
x5085
261A
Maxim and Discounts
greedy
,
sortings
1400
x5085
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5060
23A
You're Given a String...
brute force
,
greedy
1200
x5060
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5042
1513D
GCD and MST
constructive algorithms
,
dsu
,
graphs
,
greedy
,
number theory
,
sortings
2000
x5016
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5015
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x4994
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x4990
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x4984
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x4974
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x4972
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x4964
1310A
Recommendations
data structures
,
greedy
,
sortings
1700
x4955
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4954
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4942
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4940
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4933
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x4930
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x4920
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4906
924A
Mystical Mosaic
greedy
,
implementation
1300
x4904
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x4903
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4901
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x4900
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x4889
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4884
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4880
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4875
1249D2
Too Many Segments (hard version)
data structures
,
greedy
,
sortings
1800
x4862
1148D
Dirty Deeds Done Dirt Cheap
greedy
,
sortings
1800
x4858
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4851
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4848
1070D
Garbage Disposal
greedy
1300
x4847
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x4845
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4834
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4826
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4800
1249D1
Too Many Segments (easy version)
greedy
1800
x4798
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