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Before contest
Codeforces Round 941 (Div. 1)
3 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
3 days
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→ Filter Problems
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implementation
combine-tags-by-or
*combine tags by OR
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
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
907A
Masha and Bears
brute force
,
implementation
1300
x5549
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5544
817B
Makes And The Product
combinatorics
,
implementation
,
math
,
sortings
1500
x5535
887B
Cubes for Masha
brute force
,
implementation
1300
x5526
5B
Center Alignment
implementation
,
strings
1200
x5525
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5524
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5521
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5519
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5516
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5515
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5505
1463C
Busy Robot
implementation
1800
x5475
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5464
1177A
Digits Sequence (Easy Edition)
implementation
1000
x5459
676B
Pyramid of Glasses
implementation
,
math
,
math
1500
x5456
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5450
858C
Did you mean...
dp
,
greedy
,
implementation
1500
x5441
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5425
1085C
Connect Three
implementation
,
math
1600
x5360
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5351
625A
Guest From the Past
implementation
,
math
1700
x5350
234C
Weather
dp
,
implementation
1300
x5316
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5305
637A
Voting for Photos
*special problem
,
constructive algorithms
,
implementation
1000
x5303
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x5299
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5297
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x5292
1066D
Boxes Packing
binary search
,
implementation
1800
x5288
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5281
748B
Santa Claus and Keyboard Check
implementation
,
strings
1500
x5269
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5257
148B
Escape
implementation
,
math
1500
x5251
1494C
1D Sokoban
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5221
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5214
660B
Seating On Bus
implementation
1000
x5209
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5183
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5181
1543C
Need for Pink Slips
bitmasks
,
brute force
,
dfs and similar
,
implementation
,
math
,
probabilities
1900
x5179
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5173
252A
Little Xor
brute force
,
implementation
1100
x5154
87A
Trains
implementation
,
math
1500
x5154
1280A
Cut and Paste
implementation
,
math
1700
x5149
90B
African Crossword
implementation
,
strings
1100
x5144
898C
Phone Numbers
implementation
,
strings
1400
x5124
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5122
245B
Internet Address
implementation
,
strings
1100
x5118
195B
After Training
data structures
,
implementation
,
math
1300
x5114
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5113
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5112
981C
Useful Decomposition
implementation
,
trees
1400
x5111
586B
Laurenty and Shop
implementation
1300
x5111
378B
Semifinals
implementation
,
sortings
1300
x5095
725B
Food on the Plane
implementation
,
math
1200
x5087
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5043
144B
Meeting
implementation
1300
x5016
813A
The Contest
implementation
1100
x5007
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x4998
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x4983
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x4963
1468K
The Robot
brute force
,
implementation
1600
x4953
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x4949
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4941
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4938
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x4929
74A
Room Leader
implementation
1000
x4925
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x4916
216A
Tiling with Hexagons
implementation
,
math
1200
x4909
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4908
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4905
924A
Mystical Mosaic
greedy
,
implementation
1300
x4904
1055B
Alice and Hairdresser
dsu
,
implementation
1300
x4892
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4890
255B
Code Parsing
implementation
1200
x4860
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4849
312A
Whose sentence is it?
implementation
,
strings
1100
x4845
600A
Extract Numbers
implementation
,
strings
1600
x4843
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4828
1070K
Video Posts
implementation
1100
x4826
53A
Autocomplete
implementation
1100
x4819
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4799
68A
Irrational problem
implementation
,
number theory
1100
x4795
617C
Watering Flowers
implementation
1600
x4756
569A
Music
implementation
,
math
1500
x4739
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4739
955B
Not simply beatiful strings
implementation
1400
x4731
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4729
526A
King of Thieves
brute force
,
implementation
1300
x4724
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x4709
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4709
63B
Settlers' Training
implementation
1200
x4705
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4704
1172A
Nauuo and Cards
greedy
,
implementation
1800
x4700
691B
s-palindrome
implementation
,
strings
1600
x4697
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x4696
475A
Bayan Bus
implementation
1100
x4679
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4677
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4648
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4648
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4643
136B
Ternary Logic
implementation
,
math
1100
x4637
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