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Problems
#
Name
1708A
Difference Operations
greedy
,
math
800
x21455
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x144
1707E
Replace
binary search
,
data structures
3500
x556
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x577
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1380
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5517
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x12792
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2349
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1649
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6645
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x14404
1706B
Making Towers
dp
,
greedy
,
math
1100
x16189
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22526
1705F
Mark and the Online Exam
bitmasks
,
constructive algorithms
,
interactive
,
probabilities
2900
x572
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1977
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6081
1705C
Mark and His Unfinished Essay
brute force
,
implementation
1400
x12952
1705B
Mark the Dust Sweeper
constructive algorithms
,
greedy
,
implementation
900
x22116
1705A
Mark the Photographer
greedy
,
sortings
800
x24784
1704H2
Game of AI (hard version)
combinatorics
,
fft
,
math
3500
x74
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x170
1704G
Mio and Lucky Array
constructive algorithms
,
fft
,
math
,
strings
3500
x96
1704F
Colouring Game
constructive algorithms
,
dp
,
games
2600
x922
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2211
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4828
1704C
Virus
greedy
,
implementation
,
sortings
1200
x14319
1704B
Luke is a Foodie
brute force
,
greedy
,
implementation
1000
x16234
1704A
Two 0-1 Sequences
constructive algorithms
,
greedy
800
x15760
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x9938
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18023
1703E
Mirror Grid
implementation
1200
x16753
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24194
1703C
Cypher
brute force
,
implementation
,
strings
800
x33966
1703B
ICPC Balloons
data structures
,
implementation
800
x44969
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62007
1702G2
Passable Paths (hard version)
data structures
,
dfs and similar
,
trees
2000
x4266
1702G1
Passable Paths (easy version)
dfs and similar
,
trees
1900
x5079
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x7898
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12243
1702D
Not a Cheap String
greedy
1000
x22888
1702C
Train and Queries
data structures
,
greedy
1100
x21415
1702B
Polycarp Writes a String from Memory
greedy
800
x26848
1702A
Round Down the Price
constructive algorithms
800
x33326
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x880
1701E
Text Editor
brute force
,
dp
,
greedy
,
strings
2500
x1053
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5464
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15649
1701B
Permutation
greedy
800
x19934
1701A
Grass Field
implementation
800
x25805
1700F
Puzzle
constructive algorithms
,
dp
,
greedy
2600
x829
1700E
Serega the Pirate
brute force
,
constructive algorithms
2600
x824
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5814
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10435
1700B
Palindromic Numbers
constructive algorithms
,
implementation
,
math
1100
x18222
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22522
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1074
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3021
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x9364
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x19127
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x23606
1698G
Long Binary String
bitmasks
,
math
,
matrices
,
meet-in-the-middle
,
number theory
2900
x300
1698F
Equal Reversal
constructive algorithms
,
graphs
,
implementation
,
math
2800
x554
1698E
PermutationForces II
brute force
,
combinatorics
,
greedy
,
sortings
,
trees
,
two pointers
2300
x1567
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x8632
1698C
3SUM Closure
brute force
,
data structures
1300
x17839
1698B
Rising Sand
constructive algorithms
,
greedy
,
implementation
800
x20634
1698A
XOR Mixup
bitmasks
,
brute force
800
x27718
1697F
Too Many Constraints
2-sat
,
constructive algorithms
,
graphs
,
implementation
2800
x512
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1133
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4250
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13911
1697B
Promo
greedy
,
sortings
900
x25369
1697A
Parkway Walk
greedy
,
implementation
800
x25367
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x152
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x265
1696F
Tree Recovery
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
2600
x840
1696E
Placing Jinas
combinatorics
,
math
2000
x3815
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5155
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11288
1696B
NIT Destroys the Universe
greedy
900
x19198
1696A
NIT orz!
bitmasks
,
greedy
800
x18067
1695E
Ambiguous Dominoes
constructive algorithms
,
dfs and similar
,
graphs
2700
x423
1695D2
Tree Queries (Hard Version)
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1908
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2078
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10334
1695B
Circle Game
games
,
greedy
1000
x17975
1695A
Subrectangle Guess
games
800
x16094
1694B
Paranoid String
constructive algorithms
,
greedy
1200
x18463
1694A
Creep
greedy
,
implementation
800
x22098
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x274
1693E
Outermost Maximums
data structures
,
greedy
3400
x369
1693D
Decinc Dividing
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
2800
x770
1693C
Keshi in Search of AmShZ
graphs
,
greedy
,
shortest paths
2300
x2425
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8035
1693A
Directional Increase
greedy
1300
x15606
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7017
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x15809
1692F
3SUM
brute force
,
math
1300
x21156
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x19786
1692D
The Clock
brute force
,
implementation
1100
x18652
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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
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
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shortest paths
sortings
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strings
ternary search
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