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Before contest
Codeforces Round 988 (Div. 3)
43:48:44
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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
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7746
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6287
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6300
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x9422
1110B
Tape
greedy
,
sortings
1400
x11731
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4364
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8529
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4555
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15300
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11998
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3734
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x10012
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x14909
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6763
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x4136
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10432
1103A
Grid game
constructive algorithms
,
implementation
1400
x9809
1102E
Monotonic Renumeration
combinatorics
,
sortings
1700
x6049
1102D
Balanced Ternary String
greedy
,
strings
1500
x8007
1102B
Array K-Coloring
greedy
,
sortings
1400
x10450
1101E
Polycarp's New Job
implementation
1500
x7948
1101C
Division and Union
sortings
1500
x8194
1101B
Accordion
greedy
,
implementation
1300
x10614
1100B
Build a Contest
data structures
,
implementation
1300
x11183
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8803
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8452
1096D
Easy Problem
dp
1800
x8148
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6834
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10636
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x6233
1095E
Almost Regular Bracket Sequence
implementation
1900
x4137
1095D
Circular Dance
implementation
1600
x7584
1095C
Powers Of Two
bitmasks
,
greedy
1400
x17003
1093D
Beautiful Graph
dfs and similar
,
graphs
1700
x9306
1093C
Mishka and the Last Exam
greedy
1300
x9361
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x8242
1092C
Prefixes and Suffixes
strings
1700
x5950
1091D
New Year and the Permutation Concatenation
combinatorics
,
dp
,
math
1700
x6811
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x10056
1090D
Similar Arrays
constructive algorithms
1800
x2105
1090B
LaTeX Expert
1900
x1432
1090A
Company Merging
greedy
1300
x4251
1089G
Guest Student
math
1500
x2942
1089F
Fractions
math
1900
x1961
1089E
Easy Chess
constructive algorithms
1700
x1992
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8086
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5448
1085C
Connect Three
implementation
,
math
1600
x5446
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x8222
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5480
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x3822
1082C
Multi-Subject Competition
greedy
,
sortings
1600
x5781
1082B
Vova and Trophies
greedy
1600
x7587
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2600
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x4144
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x7339
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4464
1080C
Masha and two friends
implementation
1500
x4058
1077F1
Pictures with Kittens (easy version)
dp
1900
x4473
1077E
Thematic Contests
greedy
,
sortings
1800
x4734
1077D
Cutting Out
binary search
,
sortings
1600
x8980
1077C
Good Array
1300
x17677
1076E
Vasya and a Tree
data structures
,
trees
1900
x3781
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x5260
1076C
Meme Problem
binary search
,
math
1300
x12507
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6434
1073C
Vasya and Robot
binary search
,
two pointers
1800
x4807
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3666
1070F
Debate
greedy
1500
x3658
1070D
Garbage Disposal
greedy
1300
x4924
1068C
Colored Rooks
constructive algorithms
,
graphs
1700
x3163
1068A
Birthday
math
1400
x6850
1067B
Multihedgehog
dfs and similar
,
graphs
,
shortest paths
1800
x2710
1067A
Array Without Local Maximums
dp
1900
x2887
1066E
Binary Numbers AND Sum
data structures
,
implementation
,
math
1700
x6188
1066D
Boxes Packing
binary search
,
implementation
1800
x5504
1066C
Books Queries
implementation
1400
x9708
1066B
Heaters
greedy
,
two pointers
1500
x8372
1065C
Make It Equal
greedy
1600
x7855
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x10956
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x3069
1063B
Labyrinth
graphs
,
shortest paths
1800
x7581
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x10386
1062D
Fun with Integers
dfs and similar
,
graphs
,
implementation
,
math
1800
x3966
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5468
1062B
Math
greedy
,
math
,
number theory
1500
x8856
1062A
A Prank
greedy
,
implementation
1300
x8829
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9003
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7315
1060D
Social Circles
greedy
,
math
1900
x3640
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4906
1059C
Sequence Transformation
constructive algorithms
,
math
1600
x7166
1059B
Forgery
implementation
1300
x7092
1057B
DDoS
*special problem
,
brute force
1400
x1838
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5942
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2383
1056B
Divide Candies
math
,
number theory
1600
x4230
1055C
Lucky Days
math
,
number theory
1900
x1917
1055B
Alice and Hairdresser
dsu
,
implementation
1300
x5014
1054D
Changing Array
greedy
,
implementation
1900
x2254
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