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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
683E
Hammer throwing
*special problem
1800
x187
683D
Chocolate Bar
*special problem
,
math
1400
x322
683C
Symmetric Difference
*special problem
1600
x315
683B
The Teacher of Physical Education
*special problem
1600
x317
682E
Alyona and Triangles
geometry
,
two pointers
2600
x663
682D
Alyona and Strings
dp
,
strings
1900
x3289
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7211
681E
Runaway to a Shadow
geometry
,
sortings
2500
x461
681D
Gifts by the List
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2000
x1766
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7703
679E
Bear and Bad Powers of 42
data structures
3100
x683
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x315
679C
Bear and Square Grid
dfs and similar
,
dsu
,
implementation
2400
x1154
679B
Bear and Tower of Cubes
binary search
,
dp
,
greedy
2200
x2142
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x12969
678F
Lena and Queries
data structures
,
divide and conquer
,
geometry
2500
x875
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x2198
678D
Iterated Linear Function
math
,
number theory
1700
x4496
678C
Joty and Chocolate
implementation
,
math
,
number theory
1600
x9393
678B
The Same Calendar
implementation
1600
x4108
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x603
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1580
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x6405
677B
Vanya and Food Processor
implementation
,
math
1400
x7634
676E
The Last Fight Between Human and AI
math
2400
x891
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1861
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18800
676B
Pyramid of Glasses
implementation
,
math
,
math
1500
x5495
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2735
675D
Tree Construction
data structures
,
trees
1800
x3784
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3647
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7378
671E
Organizing a Race
data structures
,
greedy
3300
x408
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1145
671C
Ultimate Weirdness of an Array
data structures
,
number theory
2800
x685
671B
Robin Hood
binary search
,
greedy
2000
x3021
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4183
670F
Restore a Number
brute force
,
constructive algorithms
,
strings
2300
x859
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3212
670D2
Magic Powder - 2
binary search
,
implementation
1500
x14251
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x17683
666E
Forensic Examination
data structures
,
string suffix structures
3100
x1393
666D
Chain Reaction
brute force
,
geometry
3000
x280
666C
Codeword
combinatorics
,
strings
2500
x785
666B
World Tour
graphs
,
shortest paths
2000
x2162
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3475
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x610
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x3138
665D
Simple Subset
constructive algorithms
,
greedy
,
number theory
1800
x3478
665B
Shopping
brute force
1400
x3541
665A
Buses Between Cities
implementation
1600
x2927
663A
Rebus
constructive algorithms
,
expression parsing
,
greedy
,
math
1800
x3294
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x139
662D
International Olympiad
constructive algorithms
,
greedy
,
implementation
,
math
2000
x1632
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x2013
662B
Graph Coloring
dfs and similar
,
graphs
2200
x1473
662A
Gambling Nim
bitmasks
,
math
,
matrices
,
probabilities
2400
x467
661H
Rotate Matrix
*special problem
2400
x69
661G
Hungarian Notation
*special problem
2200
x56
661F
Primes in Interval
*special problem
1900
x323
661E
Divisibility Check
*special problem
2000
x84
661D
Maximal Difference
*special problem
2100
x132
661C
Array Sum
*special problem
2000
x132
661B
Seasons
*special problem
1900
x228
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1648
660E
Different Subsets For All Tuples
combinatorics
,
math
2300
x1501
660D
Number of Parallelograms
geometry
1900
x3971
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9334
659G
Fence Divercity
combinatorics
,
dp
,
number theory
2300
x1183
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1784
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7448
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6310
656G
You're a Professional
*special problem
1900
x483
656F
Ace It!
*special problem
1900
x907
656E
Out of Controls
*special problem
2000
x726
656D
Rosetta Problem
*special problem
2100
x958
656C
Without Text
*special problem
2000
x693
656B
Scrambled
*special problem
,
implementation
1700
x1654
656A
Da Vinci Powers
*special problem
1900
x3613
653G
Move by Prime
combinatorics
,
math
,
number theory
3100
x533
653F
Paper task
data structures
,
string suffix structures
,
strings
2600
x993
653E
Bear and Forgotten Tree 2
dfs and similar
,
dsu
,
graphs
,
trees
2400
x1497
653D
Delivery Bears
binary search
,
flows
,
graphs
2200
x2403
653C
Bear and Up-Down
brute force
,
implementation
1900
x1643
652F
Ants on a Circle
constructive algorithms
,
math
2800
x549
652E
Pursuit For Artifacts
dfs and similar
,
dsu
,
graphs
,
trees
2300
x2119
652D
Nested Segments
data structures
,
sortings
1800
x3965
652C
Foe Pairs
combinatorics
,
sortings
,
two pointers
1800
x3220
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4622
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x598
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1330
650C
Table Compression
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2200
x1976
650B
Image Preview
binary search
,
brute force
,
dp
,
two pointers
1900
x3344
650A
Watchmen
data structures
,
geometry
,
math
1400
x15458
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x108
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x356
649C
Печать условий
constructive algorithms
,
greedy
,
sortings
1500
x455
649B
Этажи
constructive algorithms
1400
x535
648E
Собери число
graphs
,
shortest paths
2300
x127
648D
Собачки и миски
data structures
,
greedy
,
sortings
1900
x232
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