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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
06:17:19
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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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Problems
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Status
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Custom test
Problems
#
Name
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6242
659B
Qualifying Contest
constructive algorithms
,
sortings
1300
x6224
656G
You're a Professional
*special problem
1900
x482
656F
Ace It!
*special problem
1900
x890
656B
Scrambled
*special problem
,
implementation
1700
x1645
656A
Da Vinci Powers
*special problem
1900
x3590
653C
Bear and Up-Down
brute force
,
implementation
1900
x1634
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4928
652D
Nested Segments
data structures
,
sortings
1800
x3900
652C
Foe Pairs
combinatorics
,
sortings
,
two pointers
1800
x3148
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4591
650B
Image Preview
binary search
,
brute force
,
dp
,
two pointers
1900
x3322
650A
Watchmen
data structures
,
geometry
,
math
1400
x15280
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x346
649C
Печать условий
constructive algorithms
,
greedy
,
sortings
1500
x443
649B
Этажи
constructive algorithms
1400
x527
648D
Собачки и миски
data structures
,
greedy
,
sortings
1900
x228
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2836
645C
Enduring Exodus
binary search
,
two pointers
1600
x3193
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2632
643B
Bear and Two Paths
constructive algorithms
,
graphs
1600
x3153
643A
Bear and Colors
implementation
1500
x4125
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x2897
641B
Little Artem and Matrix
implementation
1400
x3840
639B
Bear and Forgotten Tree 3
constructive algorithms
,
graphs
,
trees
1600
x6459
638D
Three-dimensional Turtle Super Computer
brute force
,
dfs and similar
,
graphs
1800
x704
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x1552
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1954
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1984
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2415
634A
Island Puzzle
constructive algorithms
,
implementation
1300
x3156
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2719
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6602
632C
The Smallest String Concatenation
sortings
,
strings
1700
x7517
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3944
631C
Report
data structures
,
sortings
1700
x3764
630Q
Pyramids
geometry
,
math
1700
x1252
630N
Forecast
math
1300
x4605
630M
Turn
geometry
,
math
1800
x1137
630L
Cracking the Code
implementation
,
math
1400
x3528
630K
Indivisibility
math
,
number theory
1500
x5183
630I
Parking Lot
combinatorics
,
math
1700
x6544
630H
Benches
combinatorics
,
math
1400
x4892
630G
Challenge Pennants
combinatorics
,
math
1600
x2702
630F
Selection of Personnel
combinatorics
,
math
1300
x6712
630E
A rectangle
math
1900
x2299
628C
Bear and String Distance
greedy
,
strings
1300
x5772
628B
New Skateboard
dp
1300
x10504
627B
Factory Repairs
data structures
1700
x2746
627A
XOR Equation
dp
,
math
1700
x4057
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2695
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4316
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6568
625C
K-special Tables
constructive algorithms
,
implementation
1300
x6786
625A
Guest From the Past
implementation
,
math
1700
x5372
623A
Graph and String
constructive algorithms
,
graphs
1800
x4420
622D
Optimal Number Permutation
constructive algorithms
1900
x2907
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6347
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x5388
621B
Wet Shark and Bishops
combinatorics
,
implementation
1300
x10888
620C
Pearls in a Row
greedy
1500
x6588
618C
Constellation
geometry
,
implementation
1600
x4209
617D
Polyline
constructive algorithms
,
implementation
1700
x4180
617C
Watering Flowers
implementation
1600
x4826
617B
Chocolate
combinatorics
1300
x17622
616D
Longest k-Good Segment
binary search
,
data structures
,
two pointers
1600
x9071
616C
The Labyrinth
dfs and similar
1600
x5479
615B
Longtail Hedgehog
dp
,
graphs
1600
x5003
614B
Gena's Code
implementation
,
math
1400
x6841
614A
Link/Cut Tree
brute force
,
implementation
1500
x7425
613B
Skills
binary search
,
brute force
,
dp
,
greedy
,
sortings
,
two pointers
1900
x2182
613A
Peter and Snow Blower
binary search
,
geometry
,
ternary search
1900
x3199
612D
The Union of k-Segments
greedy
,
sortings
1800
x3755
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x7861
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7106
611C
New Year and Domino
dp
,
implementation
1500
x8406
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9946
610C
Harmony Analysis
constructive algorithms
1800
x2811
610B
Vika and Squares
constructive algorithms
,
implementation
1300
x7148
609C
Load Balancing
implementation
,
math
1500
x6421
608B
Hamming Distance Sum
combinatorics
,
strings
1500
x6719
607B
Zuma
dp
1900
x11525
607A
Chain Reaction
binary search
,
dp
1600
x9448
606B
Testing Robots
implementation
1600
x2737
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3413
605A
Sorting Railway Cars
constructive algorithms
,
greedy
1600
x7075
604B
More Cowbell
binary search
,
greedy
1400
x8349
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2551
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7599
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10639
601A
The Two Routes
graphs
,
shortest paths
1600
x11658
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x5964
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x28585
600A
Extract Numbers
implementation
,
strings
1600
x5133
599D
Spongebob and Squares
brute force
,
math
1900
x2541
599C
Day at the Beach
sortings
1600
x4609
599B
Spongebob and Joke
implementation
1500
x4352
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10778
598B
Queries on a String
implementation
,
strings
1300
x10746
597C
Subsequences
data structures
,
dp
1900
x4757
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