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Problems
#
Name
1536B
Prinzessin der Verurteilung
brute force
,
constructive algorithms
,
strings
1200
x17739
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x20042
1535F
String Distance
binary search
,
brute force
,
data structures
,
hashing
,
implementation
,
strings
3000
x438
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2636
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7490
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16098
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29627
1535A
Fair Playoff
brute force
,
implementation
800
x46466
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x143
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x525
1534F2
Falling Sand (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
3000
x515
1534F1
Falling Sand (Easy Version)
dfs and similar
,
graphs
,
greedy
2500
x1192
1534E
Lost Array
graphs
,
greedy
,
interactive
,
shortest paths
2300
x1850
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5770
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12496
1534B
Histogram Ugliness
greedy
,
implementation
,
math
1100
x12364
1534A
Colour the Flag
brute force
,
implementation
800
x12582
1533J
Pawns
*special problem
x41
1533I
Excursions
*special problem
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
x47
1533H
Submatrices
*special problem
,
bitmasks
,
data structures
,
dp
x80
1533G
Biome Map
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
x86
1533F
Binary String Partition
*special problem
,
binary search
,
greedy
x208
1533E
Chess Team Forming
*special problem
,
binary search
,
data structures
,
greedy
x268
1533D
String Searching
*special problem
,
hashing
x435
1533C
Sweets
*special problem
,
data structures
,
implementation
x457
1533B
Nearest Point Function
*special problem
,
implementation
x750
1533A
Travel to Bertown
*special problem
,
implementation
,
math
x991
1532F
Prefixes and Suffixes
*special problem
,
strings
x216
1532E
Good Array
*special problem
x386
1532D
Teams Forming
*special problem
,
sortings
x581
1532C
Uniform String
*special problem
,
implementation
x635
1532B
Frog Jumping
*special problem
,
math
x819
1532A
A+B (Trial Problem)
*special problem
x1130
1531E3
Сортировка слиянием
*special problem
,
binary search
x267
1531E2
Сортировка слиянием
*special problem
,
*special problem
,
brute force
x331
1531E1
Сортировка слиянием
*special problem
x356
1531D
Редактируем Зингер | color
*special problem
,
*special problem
x351
1531C
Симметричный амфитеатр
*special problem
,
constructive algorithms
,
dp
x645
1531B2
Мониторинг
*special problem
x764
1531B1
Мониторинг
*special problem
,
*special problem
x1087
1531A
Зингер | color
*special problem
,
implementation
x1443
1530H
Turing's Award
data structures
,
dp
3400
x140
1530G
What a Reversal
constructive algorithms
3300
x133
1530F
Bingo
bitmasks
,
combinatorics
,
dp
,
math
,
probabilities
2600
x752
1530E
Minimax
constructive algorithms
,
greedy
,
strings
2100
x2896
1530D
Secret Santa
constructive algorithms
,
flows
,
graphs
,
greedy
,
math
1600
x8892
1530C
Pursuit
binary search
,
brute force
,
greedy
,
sortings
1200
x14246
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15603
1530A
Binary Decimal
greedy
,
math
800
x20766
1529B
Sifid and Strange Subsequences
greedy
,
math
,
sortings
1100
x20344
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29385
1528F
AmShZ Farm
combinatorics
,
fft
,
math
3300
x274
1528E
Mashtali and Hagh Trees
combinatorics
,
dp
,
trees
2900
x503
1528D
It's a bird! No, it's a plane! No, it's AaParsa!
constructive algorithms
,
graphs
,
shortest paths
2500
x1386
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2501
1528B
Kavi on Pairing Duty
combinatorics
,
dp
,
math
1700
x8465
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13885
1527E
Partition Game
binary search
,
data structures
,
divide and conquer
,
dp
2500
x2091
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1831
1527C
Sequence Pair Weight
hashing
,
implementation
,
math
1600
x13118
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7556
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x24275
1527A
And Then There Were K
bitmasks
800
x33952
1526F
Median Queries
constructive algorithms
,
interactive
,
probabilities
3000
x252
1526E
Oolimry and Suffix Array
combinatorics
,
constructive algorithms
,
math
2400
x1020
1526D
Kill Anton
brute force
,
constructive algorithms
,
data structures
,
math
,
strings
2200
x2356
1526C2
Potions (Hard Version)
data structures
,
greedy
1600
x21052
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x21235
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28746
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x23869
1525F
Goblins And Gnomes
brute force
,
dp
,
flows
,
graph matchings
2800
x317
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1968
1525D
Armchairs
dp
,
flows
,
graph matchings
,
greedy
1800
x9382
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4332
1525B
Permutation Sort
constructive algorithms
,
greedy
900
x24190
1525A
Potion-making
math
,
number theory
800
x25073
1523H
Hopping Around the Array
data structures
,
dp
3500
x234
1523G
Try Booking
data structures
,
divide and conquer
3200
x403
1523F
Favorite Game
bitmasks
,
dp
3300
x399
1523E
Crypto Lights
combinatorics
,
dp
,
math
,
probabilities
2600
x1533
1523D
Love-Hate
bitmasks
,
brute force
,
dp
,
probabilities
2400
x2084
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8591
1523B
Lord of the Values
constructive algorithms
1100
x11967
1523A
Game of Life
implementation
800
x13399
1521E
Nastia and a Beautiful Matrix
binary search
,
constructive algorithms
,
dp
,
greedy
2700
x649
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1806
1521C
Nastia and a Hidden Permutation
constructive algorithms
,
interactive
2000
x4278
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x20775
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35352
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3504
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2895
1520F1
Guess the K-th Zero (Easy version)
binary search
,
interactive
1600
x10945
1520E
Arranging The Sheep
greedy
,
math
1400
x19980
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42743
1520C
Not Adjacent Matrix
constructive algorithms
1000
x30653
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42882
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49728
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x388
1519E
Off by One
constructive algorithms
,
dfs and similar
,
geometry
,
graphs
,
sortings
,
trees
2700
x806
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14598
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combine-tags-by-or
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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
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games
geometry
graph matchings
graphs
greedy
hashing
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number theory
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