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Before contest
Codeforces Round 941 (Div. 1)
34:50:02
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
34:50:02
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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
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1080B
Margarite and the best present
math
900
x11473
1080A
Petya and Origami
math
800
x17747
1078E
Negative Time Summation
constructive algorithms
3400
x86
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x2855
1077F1
Pictures with Kittens (easy version)
dp
1900
x3962
1077E
Thematic Contests
greedy
,
sortings
1800
x4351
1077D
Cutting Out
binary search
,
sortings
1600
x8294
1077C
Good Array
1300
x15223
1077B
Disturbed People
greedy
1000
x18258
1077A
Frog Jumping
math
800
x29020
1076G
Array Game
data structures
,
games
3000
x448
1076F
Summer Practice Report
dp
,
greedy
2500
x619
1076E
Vasya and a Tree
data structures
,
trees
1900
x3606
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x4889
1076C
Meme Problem
binary search
,
math
1300
x12052
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x12518
1076A
Minimizing the String
greedy
,
strings
1200
x12824
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4184
1075A
The King's Race
implementation
,
math
800
x8325
1073G
Yet Another LCP Problem
data structures
,
string suffix structures
2600
x861
1073F
Choosing Two Paths
dfs and similar
,
dp
,
greedy
,
trees
2500
x518
1073E
Segment Sum
bitmasks
,
combinatorics
,
dp
,
math
2300
x2373
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6304
1073C
Vasya and Robot
binary search
,
two pointers
1800
x4544
1073B
Vasya and Books
implementation
,
math
1000
x10401
1073A
Diverse Substring
implementation
,
strings
1000
x14846
1071E
Rain Protection
binary search
,
geometry
3500
x90
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x64
1070L
Odd Federalization
constructive algorithms
2600
x280
1070K
Video Posts
implementation
1100
x4826
1070J
Streets and Avenues in Berhattan
dp
2300
x678
1070I
Privatization of Roads in Berland
flows
,
graph matchings
,
graphs
2400
x532
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3608
1070G
Monsters and Potions
brute force
,
dp
,
greedy
,
implementation
2300
x814
1070F
Debate
greedy
1500
x3569
1070E
Getting Deals Done
binary search
,
data structures
2100
x1189
1070D
Garbage Disposal
greedy
1300
x4847
1070C
Cloud Computing
data structures
,
greedy
2000
x1995
1070B
Berkomnadzor
data structures
,
greedy
2400
x468
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2259
1068C
Colored Rooks
constructive algorithms
,
graphs
1700
x3105
1068B
LCM
math
,
number theory
1200
x11065
1068A
Birthday
math
1400
x6624
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x421
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x351
1067C
Knights
constructive algorithms
2600
x610
1067B
Multihedgehog
dfs and similar
,
graphs
,
shortest paths
1800
x2505
1067A
Array Without Local Maximums
dp
1900
x2769
1066F
Yet another 2D Walking
dp
2100
x1758
1066E
Binary Numbers AND Sum
data structures
,
implementation
,
math
1700
x5992
1066D
Boxes Packing
binary search
,
implementation
1800
x5290
1066C
Books Queries
implementation
1400
x9361
1066B
Heaters
greedy
,
two pointers
1500
x8054
1066A
Vova and Train
math
1100
x14236
1065G
Fibonacci Suffix
strings
2700
x239
1065F
Up and Down the Tree
dfs and similar
,
dp
,
trees
2500
x1131
1065E
Side Transmutations
combinatorics
,
strings
2300
x1017
1065D
Three Pieces
dfs and similar
,
dp
,
shortest paths
2200
x1268
1065C
Make It Equal
greedy
1600
x7632
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x10732
1065A
Vasya and Chocolate
implementation
,
math
800
x14528
1064B
Equations of Mathematical Magic
math
1200
x7442
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21619
1063F
String Journey
data structures
,
dp
,
string suffix structures
3300
x796
1063E
Lasers and Mirrors
constructive algorithms
,
math
3000
x329
1063D
Candies for Children
brute force
,
math
2600
x417
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2787
1063B
Labyrinth
graphs
,
shortest paths
1800
x7042
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x10207
1062F
Upgrading Cities
dfs and similar
,
graphs
2900
x542
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1702
1062D
Fun with Integers
dfs and similar
,
graphs
,
implementation
,
math
1800
x3861
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5305
1062B
Math
greedy
,
math
,
number theory
1500
x8387
1062A
A Prank
greedy
,
implementation
1300
x8647
1061F
Lost Root
interactive
,
probabilities
2400
x682
1061E
Politics
flows
,
graphs
2600
x509
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2292
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x8328
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7213
1061A
Coins
greedy
,
implementation
,
math
800
x21285
1060H
Sophisticated Device
constructive algorithms
3300
x209
1060G
Balls and Pockets
data structures
3400
x133
1060F
Shrinking Tree
combinatorics
,
dp
2900
x527
1060E
Sergey and Subway
dfs and similar
,
dp
,
trees
2000
x2971
1060D
Social Circles
greedy
,
math
1900
x3557
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4800
1060B
Maximum Sum of Digits
greedy
1100
x8770
1060A
Phone Numbers
brute force
800
x13677
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1351
1059D
Nature Reserve
binary search
,
geometry
,
ternary search
2200
x2537
1059C
Sequence Transformation
constructive algorithms
,
math
1600
x6970
1059B
Forgery
implementation
1300
x6892
1059A
Cashier
implementation
1000
x12419
1057C
Tanya and Colored Candies
*special problem
,
dp
2000
x863
1057B
DDoS
*special problem
,
brute force
1400
x1782
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x5743
1056H
Detect Robots
data structures
,
strings
3200
x144
1056G
Take Metro
brute force
,
data structures
,
graphs
2900
x238
1056F
Write The Contest
binary search
,
dp
,
math
2500
x462
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