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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
04:15:40
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Difficulty:
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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
1133F1
Spanning Tree with Maximum Degree
graphs
1600
x7672
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x5343
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x11448
1132C
Painting the Fence
brute force
1700
x5387
1131F
Asya And Kittens
constructive algorithms
,
dsu
1700
x6549
1131B
Draw!
greedy
,
implementation
1400
x9672
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8464
1129A2
Toy Train
brute force
,
greedy
1800
x4069
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3798
1121C
System Testing
implementation
1600
x1951
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1627
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4939
1119D
Frets On Fire
binary search
,
sortings
1800
x4774
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6805
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x10581
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5816
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4097
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x6184
1118D1
Coffee and Coursework (Easy version)
brute force
,
greedy
1700
x5607
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5710
1117C
Magic Ship
binary search
1900
x6760
1115U3
Block unitary
*special problem
1700
x197
1115U2
Chessboard unitary
*special problem
1600
x232
1115U1
Anti-diagonal unitary
*special problem
1500
x254
1115G3
Palindrome checker oracle
*special problem
1600
x229
1115G2
OR oracle
*special problem
1600
x310
1114D
Flood Fill
dp
1900
x6671
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7312
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8910
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7700
1111C
Creative Snap
binary search
,
brute force
,
divide and conquer
,
math
1700
x6172
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6220
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x9137
1110B
Tape
greedy
,
sortings
1400
x11067
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4298
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8436
1108E1
Array and Segments (Easy version)
brute force
,
greedy
,
implementation
1800
x4462
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14902
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11872
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3702
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9873
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x14346
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x6719
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x4031
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10267
1103A
Grid game
constructive algorithms
,
implementation
1400
x9686
1102E
Monotonic Renumeration
combinatorics
,
sortings
1700
x5814
1102D
Balanced Ternary String
greedy
,
strings
1500
x7915
1102B
Array K-Coloring
greedy
,
sortings
1400
x10298
1101E
Polycarp's New Job
implementation
1500
x7773
1101C
Division and Union
sortings
1500
x7830
1101B
Accordion
greedy
,
implementation
1300
x10424
1100B
Build a Contest
data structures
,
implementation
1300
x11062
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8667
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8410
1096D
Easy Problem
dp
1800
x7805
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6719
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10483
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x6019
1095E
Almost Regular Bracket Sequence
implementation
1900
x4067
1095D
Circular Dance
implementation
1600
x7485
1095C
Powers Of Two
bitmasks
,
greedy
1400
x16406
1093D
Beautiful Graph
dfs and similar
,
graphs
1700
x8757
1093C
Mishka and the Last Exam
greedy
1300
x9326
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x7667
1092C
Prefixes and Suffixes
strings
1700
x5857
1091D
New Year and the Permutation Concatenation
combinatorics
,
dp
,
math
1700
x6681
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x9910
1090D
Similar Arrays
constructive algorithms
1800
x2006
1090B
LaTeX Expert
1900
x1388
1090A
Company Merging
greedy
1300
x4134
1089G
Guest Student
math
1500
x2870
1089F
Fractions
math
1900
x1907
1089E
Easy Chess
constructive algorithms
1700
x1962
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8020
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5385
1085C
Connect Three
implementation
,
math
1600
x5392
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x7870
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5323
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x3770
1082C
Multi-Subject Competition
greedy
,
sortings
1600
x5669
1082B
Vova and Trophies
greedy
1600
x7465
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2553
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x3956
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x7175
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4421
1080C
Masha and two friends
implementation
1500
x4009
1077F1
Pictures with Kittens (easy version)
dp
1900
x4318
1077E
Thematic Contests
greedy
,
sortings
1800
x4624
1077D
Cutting Out
binary search
,
sortings
1600
x8722
1077C
Good Array
1300
x16550
1076E
Vasya and a Tree
data structures
,
trees
1900
x3657
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x5028
1076C
Meme Problem
binary search
,
math
1300
x12267
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6369
1073C
Vasya and Robot
binary search
,
two pointers
1800
x4630
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3632
1070F
Debate
greedy
1500
x3579
1070D
Garbage Disposal
greedy
1300
x4876
1068C
Colored Rooks
constructive algorithms
,
graphs
1700
x3134
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