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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
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7039
730G
Car Repair Shop
implementation
1600
x2185
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2490
730A
Toda 2
greedy
,
implementation
1800
x1592
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3772
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3939
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1887
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7500
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x1998
725D
Contest Balloons
data structures
,
greedy
1800
x2810
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2648
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2145
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4016
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6975
723C
Polycarp at the Radio
greedy
1600
x4705
722C
Destroying Array
data structures
,
dsu
1600
x9521
721C
Journey
dp
,
graphs
1800
x5917
719B
Anatoly and Cockroaches
greedy
1400
x8502
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4404
715A
Plus and Square Root
constructive algorithms
,
math
1600
x5625
713A
Sonya and Queries
data structures
,
implementation
1400
x8504
712C
Memory and De-Evolution
greedy
,
math
1600
x5851
711C
Coloring Trees
dp
1700
x8279
711B
Chris and Magic Square
constructive algorithms
,
implementation
1400
x8425
710C
Magic Odd Square
constructive algorithms
,
math
1500
x5137
710B
Optimal Point on a Line
brute force
,
sortings
1400
x8806
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x4741
707C
Pythagorean Triples
math
,
number theory
1500
x12698
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x10215
706C
Hard problem
dp
,
strings
1600
x16442
704A
Thor
brute force
,
data structures
,
implementation
1600
x9346
703B
Mishka and trip
implementation
,
math
1400
x5688
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x15349
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11991
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x15344
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x4020
699B
One Bomb
implementation
1400
x7614
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5759
698A
Vacations
dp
1400
x30792
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5760
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3526
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x6124
691D
Swaps in Permutation
dfs and similar
,
dsu
,
math
1700
x5559
691C
Exponential notation
implementation
,
strings
1800
x2615
691B
s-palindrome
implementation
,
strings
1600
x7446
690E1
Photographs (I)
1800
x677
690D2
The Wall (medium)
combinatorics
1800
x1249
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3822
690B1
Recover Polygon (easy)
1700
x941
689C
Mike and Chocolate Thieves
binary search
,
combinatorics
,
math
1700
x5394
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x6021
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5274
687B
Remainders Game
chinese remainder theorem
,
math
,
number theory
1800
x5951
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x14473
685A
Robbers' watch
brute force
,
combinatorics
,
dp
,
math
1700
x4251
683F
Reformat the String
*special problem
1800
x146
683E
Hammer throwing
*special problem
1800
x188
683D
Chocolate Bar
*special problem
,
math
1400
x323
683C
Symmetric Difference
*special problem
1600
x322
683B
The Teacher of Physical Education
*special problem
1600
x317
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7288
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7820
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x13167
678D
Iterated Linear Function
math
,
number theory
1700
x4569
678C
Joty and Chocolate
implementation
,
math
,
number theory
1600
x9562
678B
The Same Calendar
implementation
1600
x4144
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x6447
677B
Vanya and Food Processor
implementation
,
math
1400
x7667
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x19065
676B
Pyramid of Glasses
implementation
,
math
,
math
1500
x5532
675D
Tree Construction
data structures
,
trees
1800
x3818
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7425
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4193
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3241
670D2
Magic Powder - 2
binary search
,
implementation
1500
x14689
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x18292
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3557
665D
Simple Subset
constructive algorithms
,
greedy
,
number theory
1800
x3602
665B
Shopping
brute force
1400
x3558
665A
Buses Between Cities
implementation
1600
x2952
663A
Rebus
constructive algorithms
,
expression parsing
,
greedy
,
math
1800
x3303
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9550
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7492
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6342
656B
Scrambled
*special problem
,
implementation
1700
x1655
652D
Nested Segments
data structures
,
sortings
1800
x4038
652C
Foe Pairs
combinatorics
,
sortings
,
two pointers
1800
x3256
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4789
650A
Watchmen
data structures
,
geometry
,
math
1400
x15588
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x361
649C
Печать условий
constructive algorithms
,
greedy
,
sortings
1500
x461
649B
Этажи
constructive algorithms
1400
x539
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2936
645C
Enduring Exodus
binary search
,
two pointers
1600
x3331
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2705
643B
Bear and Two Paths
constructive algorithms
,
graphs
1600
x3179
643A
Bear and Colors
implementation
1500
x4151
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x3081
641B
Little Artem and Matrix
implementation
1400
x3988
639B
Bear and Forgotten Tree 3
constructive algorithms
,
graphs
,
trees
1600
x6533
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