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Pinely Round 4 (Div. 1 + Div. 2)
12:09:48
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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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Status
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Custom test
Problems
#
Name
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x486
753C
Interactive Bulls and Cows (Hard)
brute force
,
constructive algorithms
,
interactive
2500
x286
750H
New Year and Snowy Grid
dfs and similar
,
dsu
,
graphs
,
interactive
3500
x191
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x446
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x482
750E
New Year and Old Subsequence
data structures
,
divide and conquer
,
dp
,
matrices
2600
x1529
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1039
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x416
744E
Hongcow Masters the Cyclic Shift
strings
,
two pointers
3200
x134
744D
Hongcow Draws a Circle
geometry
3200
x119
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x1067
741E
Arpa’s abnormal DNA and Mehrdad’s deep interest
data structures
,
string suffix structures
3400
x177
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2551
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x2524
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2117
739D
Recover a functional graph
graph matchings
3400
x186
739C
Alyona and towers
data structures
2500
x1478
737F
Dirty plates
constructive algorithms
,
math
3300
x70
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x121
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x185
736D
Permutations
math
,
matrices
2800
x455
735E
Ostap and Tree
dp
,
trees
2500
x854
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1286
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x883
730L
Expression Queries
data structures
3200
x86
730K
Roads Orientation Problem
graphs
3200
x98
730F
Ber Patio
3100
x90
729F
Financiers Game
dp
2500
x939
725G
Messages on a Tree
3300
x163
725F
Family Photos
games
,
greedy
2900
x523
725E
Too Much Money
brute force
,
greedy
2600
x647
724G
Xor-matic Number of the Graph
bitmasks
,
graphs
,
math
,
number theory
,
trees
2600
x1020
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x397
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1272
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x489
722E
Research Rover
combinatorics
,
dp
2900
x813
721E
Road to Home
binary search
,
dp
2700
x303
720F
Array Covering
data structures
3100
x146
720E
Cipher
implementation
3100
x64
720D
Slalom
data structures
,
dp
,
sortings
3100
x227
720C
Homework
constructive algorithms
3100
x99
720B
Cactusophobia
dfs and similar
,
flows
2400
x401
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x351
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x392
717I
Cowboy Beblop at his computer
geometry
2800
x203
717H
Pokermon League challenge
math
,
probabilities
2400
x420
717G
Underfail
flows
2400
x632
717F
Heroes of Making Magic III
data structures
2600
x290
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x145
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x339
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x350
715D
Create a Maze
constructive algorithms
3100
x250
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x2024
713E
Sonya Partymaker
binary search
,
dp
3300
x349
713D
Animals and Puzzle
binary search
,
data structures
2700
x1107
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x610
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1766
710D
Two Arithmetic Progressions
math
,
number theory
2500
x1220
708E
Student's Camp
dp
,
math
3100
x958
708D
Incorrect Flow
flows
2900
x714
707E
Garlands
data structures
2400
x1135
706E
Working routine
data structures
,
implementation
2500
x1177
704E
Iron Man
data structures
,
geometry
,
trees
3300
x279
704D
Captain America
flows
,
greedy
3100
x788
704C
Black Widow
dp
,
graphs
,
implementation
,
math
2900
x460
704B
Ant Man
dp
,
graphs
,
greedy
2500
x1622
703E
Mishka and Divisors
dp
,
number theory
2600
x592
702F
T-Shirts
data structures
2800
x1307
700E
Cool Slogans
string suffix structures
,
strings
3300
x1168
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x457
700C
Break Up
dfs and similar
,
graphs
2600
x1261
698F
Coprime Permutation
combinatorics
,
number theory
3000
x434
698E
Cron
2800
x115
698D
Limak and Shooting Points
brute force
,
geometry
,
math
2600
x532
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1289
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x120
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x501
696D
Legen...
data structures
,
dp
,
matrices
,
strings
2500
x1260
690F3
Tree of Life (hard)
trees
3200
x47
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x81
690E2
Photographs (II)
2600
x142
690B3
Recover Polygon (hard)
data structures
2600
x91
690B2
Recover Polygon (medium)
geometry
2600
x198
690A3
Collective Mindsets (hard)
2400
x530
687E
TOF
dfs and similar
,
graphs
2900
x316
687D
Dividing Kingdom II
brute force
,
data structures
,
dsu
,
graphs
,
sortings
2500
x861
685E
Travelling Through the Snow Queen's Kingdom
bitmasks
,
brute force
,
divide and conquer
,
graphs
2800
x540
685D
Kay and Eternity
brute force
,
implementation
,
sortings
2600
x480
685C
Optimal Point
binary search
,
math
2900
x577
683J
The Hero with Bombs
*special problem
3000
x40
683I
Loader
*special problem
,
graphs
2500
x38
682E
Alyona and Triangles
geometry
,
two pointers
2600
x661
681E
Runaway to a Shadow
geometry
,
sortings
2500
x457
679E
Bear and Bad Powers of 42
data structures
3100
x677
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x313
679C
Bear and Square Grid
dfs and similar
,
dsu
,
implementation
2400
x1145
678F
Lena and Queries
data structures
,
divide and conquer
,
geometry
2500
x861
676E
The Last Fight Between Human and AI
math
2400
x885
671E
Organizing a Race
data structures
,
greedy
3300
x403
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1130
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