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Rayan
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Before contest
Good Bye 2024: 2025 is NEAR
3 days
→ Filter Problems
Difficulty:
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*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
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7321
682B
Alyona and Mex
sortings
1200
x11612
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x22006
681E
Runaway to a Shadow
geometry
,
sortings
2500
x473
681D
Gifts by the List
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2000
x1792
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7936
681B
Economy Game
brute force
1300
x9019
681A
A Good Contest
implementation
800
x15691
680B
Bear and Finding Criminals
constructive algorithms
,
implementation
1000
x24619
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x12579
679E
Bear and Bad Powers of 42
data structures
3100
x697
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x318
679C
Bear and Square Grid
dfs and similar
,
dsu
,
implementation
2400
x1162
679B
Bear and Tower of Cubes
binary search
,
dp
,
greedy
2200
x2155
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x13425
678F
Lena and Queries
data structures
,
divide and conquer
,
geometry
2500
x895
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x2262
678D
Iterated Linear Function
math
,
number theory
1700
x4601
678C
Joty and Chocolate
implementation
,
math
,
number theory
1600
x9698
678B
The Same Calendar
implementation
1600
x4160
678A
Johny Likes Numbers
implementation
,
math
800
x13437
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x605
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1708
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x6469
677B
Vanya and Food Processor
implementation
,
math
1400
x7680
677A
Vanya and Fence
implementation
800
x146568
676E
The Last Fight Between Human and AI
math
2400
x899
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1865
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x19244
676B
Pyramid of Glasses
implementation
,
math
,
math
1500
x5556
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13877
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2820
675D
Tree Construction
data structures
,
trees
1800
x3825
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3672
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7442
675A
Infinite Sequence
math
1100
x15016
673B
Problems for Round
greedy
,
implementation
1300
x3529
673A
Bear and Game
implementation
800
x10117
672B
Different is Good
constructive algorithms
,
implementation
,
strings
1000
x17508
672A
Summer Camp
implementation
800
x15451
671E
Organizing a Race
data structures
,
greedy
3300
x420
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1193
671C
Ultimate Weirdness of an Array
data structures
,
number theory
2800
x694
671B
Robin Hood
binary search
,
greedy
2000
x3091
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4208
670F
Restore a Number
brute force
,
constructive algorithms
,
strings
2300
x863
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3253
670D2
Magic Powder - 2
binary search
,
implementation
1500
x14943
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x18586
670C
Cinema
implementation
,
sortings
1300
x9246
670B
Game of Robots
implementation
1000
x11326
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x17150
669A
Little Artem and Presents
math
800
x10913
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x5643
667A
Pouring Rain
geometry
,
math
1100
x8073
666E
Forensic Examination
data structures
,
string suffix structures
3100
x1409
666D
Chain Reaction
brute force
,
geometry
3000
x284
666C
Codeword
combinatorics
,
strings
2500
x790
666B
World Tour
graphs
,
shortest paths
2000
x2182
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3584
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x632
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x3280
665D
Simple Subset
constructive algorithms
,
greedy
,
number theory
1800
x3651
665C
Simple Strings
dp
,
greedy
,
strings
1300
x10877
665B
Shopping
brute force
1400
x3571
665A
Buses Between Cities
implementation
1600
x2969
664A
Complicated GCD
math
,
number theory
800
x18666
663A
Rebus
constructive algorithms
,
expression parsing
,
greedy
,
math
1800
x3306
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x140
662D
International Olympiad
constructive algorithms
,
greedy
,
implementation
,
math
2000
x1637
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x2050
662B
Graph Coloring
dfs and similar
,
graphs
2200
x1519
662A
Gambling Nim
bitmasks
,
math
,
matrices
,
probabilities
2400
x491
661H
Rotate Matrix
*special problem
2400
x69
661G
Hungarian Notation
*special problem
2200
x56
661F
Primes in Interval
*special problem
1900
x361
661E
Divisibility Check
*special problem
2000
x85
661D
Maximal Difference
*special problem
2100
x132
661C
Array Sum
*special problem
2000
x133
661B
Seasons
*special problem
1900
x228
661A
Lazy Caterer Sequence
*special problem
1300
x638
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1715
660E
Different Subsets For All Tuples
combinatorics
,
math
2300
x1540
660D
Number of Parallelograms
geometry
1900
x4028
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9604
660B
Seating On Bus
implementation
1000
x5438
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x9112
659G
Fence Divercity
combinatorics
,
dp
,
number theory
2300
x1213
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1819
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7514
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6355
659C
Tanya and Toys
greedy
,
implementation
1200
x11524
659B
Qualifying Contest
constructive algorithms
,
sortings
1300
x6314
659A
Round House
implementation
,
math
1000
x15993
658A
Bear and Reverse Radewoosh
implementation
800
x7117
656G
You're a Professional
*special problem
1900
x487
656F
Ace It!
*special problem
1900
x911
656E
Out of Controls
*special problem
2000
x729
656D
Rosetta Problem
*special problem
2100
x961
656C
Without Text
*special problem
2000
x695
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