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Codeforces Round 987 (Div. 2)
31:49:37
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data structures
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
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1647
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2694
1166F
Vicky's Delivery Service
data structures
,
dsu
,
graphs
,
hashing
2400
x713
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x21307
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x942
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x686
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3672
1163B2
Cat Party (Hard Edition)
data structures
,
implementation
1600
x7261
1163B1
Cat Party (Easy Edition)
data structures
,
implementation
1500
x7005
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1953
1157E
Minimum Array
binary search
,
data structures
,
greedy
1700
x8438
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x3077
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6958
1154E
Two Teams
data structures
,
implementation
,
sortings
1800
x6345
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3349
1149C
Tree Generator™
data structures
,
implementation
,
trees
2700
x1293
1148H
Holy Diver
data structures
3500
x267
1146E
Hot is Cold
bitmasks
,
data structures
,
divide and conquer
,
implementation
2400
x911
1142B
Lynyrd Skynyrd
data structures
,
dfs and similar
,
dp
,
math
,
trees
2000
x3073
1141F2
Same Sum Blocks (Hard)
data structures
,
greedy
1900
x4229
1140G
Double Tree
data structures
,
divide and conquer
,
shortest paths
,
trees
2700
x501
1140F
Extending Set of Points
data structures
,
divide and conquer
,
dsu
2600
x1231
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9616
1139F
Dish Shopping
data structures
,
divide and conquer
2500
x439
1137F
Matches Are Not a Child's Play
data structures
,
trees
3400
x468
1137E
Train Car Selection
data structures
,
greedy
2700
x512
1136E
Nastya Hasn't Written a Legend
binary search
,
data structures
2200
x1085
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x1038
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x442
1129D
Isolation
data structures
,
dp
2900
x1065
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x929
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x260
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x731
1117G
Recursive Queries
data structures
2500
x701
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1981
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x944
1110F
Nearest Leaf
data structures
,
trees
2600
x1755
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x293
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x552
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x256
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2215
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x1069
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2581
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x14906
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6763
1104B
Game with string
data structures
,
implementation
,
math
1200
x15005
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4732
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2497
1100B
Build a Contest
data structures
,
implementation
1300
x11182
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x959
1098D
Eels
data structures
2800
x775
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x1927
1093E
Intersection of Permutations
data structures
2400
x1643
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x3012
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x1012
1090C
New Year Presents
constructive algorithms
,
data structures
2400
x503
1089K
King Kog's Reception
data structures
2400
x1116
1088F
Ehab and a weird weight formula
data structures
,
trees
2800
x517
1085G
Beautiful Matrix
combinatorics
,
data structures
,
dp
2900
x526
1083F
The Fair Nut and Amusing Xor
data structures
3300
x277
1083E
The Fair Nut and Rectangles
data structures
,
dp
,
geometry
2400
x4291
1083D
The Fair Nut's getting crazy
data structures
,
implementation
3500
x239
1083C
Max Mex
data structures
,
trees
2900
x921
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5477
1081H
Palindromic Magic
data structures
,
hashing
,
strings
3500
x107
1080F
Katya and Segments Sets
data structures
,
interactive
,
sortings
2400
x715
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x3357
1076G
Array Game
data structures
,
games
3000
x591
1076E
Vasya and a Tree
data structures
,
trees
1900
x3781
1073G
Yet Another LCP Problem
data structures
,
string suffix structures
2600
x925
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6432
1070E
Getting Deals Done
binary search
,
data structures
2100
x1388
1070C
Cloud Computing
data structures
,
greedy
2000
x2061
1070B
Berkomnadzor
data structures
,
greedy
2400
x652
1066E
Binary Numbers AND Sum
data structures
,
implementation
,
math
1700
x6187
1063F
String Journey
data structures
,
dp
,
string suffix structures
3300
x886
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1799
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2375
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9000
1060G
Balls and Pockets
data structures
3400
x159
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1447
1056H
Detect Robots
data structures
,
strings
3200
x159
1056G
Take Metro
brute force
,
data structures
,
graphs
2900
x257
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x2279
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x398
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x976
1045J
Moonwalk challenge
data structures
,
strings
,
trees
2600
x171
1045G
AI robots
data structures
2200
x1683
1045A
Last chance
data structures
,
flows
,
graph matchings
,
graphs
,
trees
2500
x540
1044F
DFS
data structures
2700
x579
1044D
Deduction Queries
data structures
,
dsu
2400
x1014
1043G
Speckled Band
data structures
,
divide and conquer
,
hashing
,
string suffix structures
,
strings
3500
x238
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1315
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x6274
1041F
Ray in the tube
data structures
,
divide and conquer
,
dp
,
math
2500
x1503
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3601
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x6002
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9522
1039E
Summer Oenothera Exhibition
data structures
3400
x272
1039D
You Are Given a Tree
data structures
,
dp
,
trees
2800
x1846
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