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Codeforces Round 987 (Div. 2)
31:51:22
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Difficulty:
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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
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6958
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11931
1154G
Minimum Possible LCM
brute force
,
greedy
,
math
,
number theory
2200
x2806
1154F
Shovels Shop
dp
,
greedy
,
sortings
2100
x2863
1154D
Walking Robot
greedy
1500
x9994
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x5009
1153C
Serval and Parenthesis Sequence
greedy
,
strings
1700
x7432
1153B
Serval and Toy Bricks
constructive algorithms
,
greedy
1200
x9091
1152D
Neko and Aki's Prank
dp
,
greedy
,
trees
2100
x2432
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x15326
1151D
Stas and the Queue at the Buffet
greedy
,
math
,
sortings
1600
x8464
1150B
Tiling Challenge
greedy
,
implementation
900
x11329
1150A
Stock Arbitraging
greedy
,
implementation
800
x11867
1149D
Abandoning Roads
brute force
,
dp
,
graphs
,
greedy
3000
x789
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x15286
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1683
1148D
Dirty Deeds Done Dirt Cheap
greedy
,
sortings
1800
x4997
1148A
Another One Bites The Dust
greedy
800
x14933
1144G
Two Merged Sequences
dp
,
greedy
2400
x2011
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x10325
1144B
Parity Alternated Deletions
greedy
,
implementation
,
sortings
900
x17136
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2294
1141F2
Same Sum Blocks (Hard)
data structures
,
greedy
1900
x4229
1141F1
Same Sum Blocks (Easy)
greedy
1900
x3887
1141D
Colored Boots
greedy
,
implementation
1500
x8579
1140D
Minimum Triangulation
dp
,
greedy
,
math
1200
x12667
1139B
Chocolates
greedy
,
implementation
1000
x16513
1138B
Circus
brute force
,
greedy
,
math
,
strings
1800
x4035
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x18541
1137E
Train Car Selection
data structures
,
greedy
2700
x512
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x6189
1136D
Nastya Is Buying Lunch
greedy
1800
x3830
1133F2
Spanning Tree with One Fixed Degree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x3388
1132E
Knapsack
dfs and similar
,
dp
,
greedy
2300
x1509
1132D
Stressful Training
binary search
,
greedy
2300
x1937
1132B
Discounts
greedy
,
sortings
900
x13068
1132A
Regular Bracket Sequence
greedy
,
implementation
1100
x9633
1131E
String Multiplication
dp
,
greedy
,
strings
2300
x1152
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x3318
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x14882
1131B
Draw!
greedy
,
implementation
1400
x9745
1130B
Two Cakes
greedy
1200
x7929
1129A2
Toy Train
brute force
,
greedy
1800
x4110
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3831
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x260
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1413
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x429
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1643
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x5043
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6850
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x11196
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10859
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6336
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5701
1117B
Emotes
greedy
,
math
,
sortings
1000
x14478
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8992
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18795
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7746
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17349
1110B
Tape
greedy
,
sortings
1400
x11722
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2965
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4554
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15297
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11998
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x23300
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x10012
1107A
Digits Sequence Dividing
greedy
,
strings
900
x12064
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x14906
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14728
1102D
Balanced Ternary String
greedy
,
strings
1500
x8007
1102B
Array K-Coloring
greedy
,
sortings
1400
x10449
1101B
Accordion
greedy
,
implementation
1300
x10614
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2497
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1088
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1687
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8803
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x485
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8451
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18803
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x6229
1095C
Powers Of Two
bitmasks
,
greedy
1400
x17000
1093C
Mishka and the Last Exam
greedy
1300
x9360
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16591
1092E
Minimal Diameter Forest
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2000
x1748
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x4824
1091F
New Year and the Mallard Expedition
constructive algorithms
,
greedy
2600
x827
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x1012
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10689
1090L
Berland University
greedy
,
math
2000
x1289
1090A
Company Merging
greedy
1300
x4250
1089J
JS Minification
greedy
,
implementation
3200
x130
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1493
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8083
1085E
Vasya and Templates
greedy
,
implementation
,
strings
2300
x1066
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x7826
1083B
The Fair Nut and Strings
greedy
,
strings
2000
x1959
1082E
Increasing Frequency
binary search
,
dp
,
greedy
2000
x4640
1082C
Multi-Subject Competition
greedy
,
sortings
1600
x5781
1082B
Vova and Trophies
greedy
1600
x7586
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2600
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