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Pinely Round 4 (Div. 1 + Div. 2)
10:06:17
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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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Status
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Custom test
Problems
#
Name
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1141
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x218
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x387
833C
Ever-Hungry Krakozyabra
brute force
,
combinatorics
,
greedy
,
math
2700
x465
832E
Vasya and Shifts
matrices
2600
x316
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x444
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x274
830D
Singer House
combinatorics
,
dp
,
graphs
,
trees
2800
x816
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x392
827E
Rusty String
fft
,
math
,
strings
2700
x862
827D
Best Edge Weight
data structures
,
dfs and similar
,
graphs
,
trees
2700
x1090
825G
Tree Queries
dfs and similar
,
graphs
,
trees
2500
x1166
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1392
822F
Madness
constructive algorithms
,
dfs and similar
,
trees
2500
x290
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x802
819E
Mister B and Flight to the Moon
constructive algorithms
,
graphs
2800
x507
819D
Mister B and Astronomers
number theory
2900
x224
819C
Mister B and Beacons on Field
number theory
2900
x206
818G
Four Melodies
flows
,
graphs
2600
x651
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x221
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x606
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2558
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x645
813F
Bipartite Checking
data structures
,
dsu
,
graphs
2500
x1263
813D
Two Melodies
dp
,
flows
2600
x1011
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x329
811E
Vladik and Entertaining Flags
data structures
,
dsu
,
graphs
2600
x855
809E
Surprise me!
divide and conquer
,
math
,
number theory
,
trees
3100
x728
809D
Hitchhiking in the Baltic States
data structures
,
dp
2900
x817
809C
Find a car
combinatorics
,
divide and conquer
,
dp
2600
x736
808F
Card Game
binary search
,
flows
,
graphs
2400
x1136
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x161
804E
The same permutation
constructive algorithms
3100
x412
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1266
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x895
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1156
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x295
802F
Marmots (hard)
math
,
probabilities
2800
x121
802C
Heidi and Library (hard)
flows
2600
x549
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x114
799F
Beautiful fountains rows
data structures
3500
x430
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x928
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x469
798D
Mike and distribution
constructive algorithms
,
sortings
2400
x1872
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1154
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x176
796E
Exam Cheating
binary search
,
dp
2400
x647
794G
Replace All
combinatorics
,
dp
,
math
3400
x332
794F
Leha and security system
data structures
2800
x802
794E
Choosing Carrot
games
,
math
2800
x783
794D
Labelling Cities
dfs and similar
,
graphs
,
hashing
2400
x802
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x374
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x539
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x245
792F
Mages and Monsters
data structures
,
geometry
3100
x202
792E
Colored Balls
greedy
,
math
,
number theory
2500
x1062
788E
New task
data structures
2900
x334
788D
Finding lines
constructive algorithms
,
divide and conquer
,
interactive
3000
x362
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x610
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x140
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2707
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x118
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x652
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1033
778E
Selling Numbers
dp
,
sortings
3000
x304
778D
Parquet Re-laying
constructive algorithms
2700
x500
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x872
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x335
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x429
775A
University Schedule
*special problem
2900
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x176
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x106
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x187
773E
Blog Post Rating
data structures
,
sortings
3000
x350
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x584
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x125
772D
Varying Kibibits
bitmasks
,
dp
2700
x583
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x80
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x446
771D
Bear and Company
dp
2500
x1170
768G
The Winds of Winter
binary search
,
data structures
3300
x356
767E
Change-free
greedy
2400
x958
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x84
765F
Souvenirs
data structures
3100
x1953
763E
Timofey and our friends animals
data structures
,
divide and conquer
,
dsu
2900
x487
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x529
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x706
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x367
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x408
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x623
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x474
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x493
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1138
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1294
756F
Long number
expression parsing
,
math
,
number theory
3400
x92
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x158
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x997
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x898
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1310
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x826
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