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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
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number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
1408I
Bitwise Magic
dp
,
math
3200
x166
924F
Minimal Subset Difference
dp
3200
x157
500G
New Year Running
number theory
,
trees
3200
x156
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x152
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x146
1056H
Detect Robots
data structures
,
strings
3200
x146
744E
Hongcow Masters the Cyclic Shift
strings
,
two pointers
3200
x132
1242E
Planar Perimeter
constructive algorithms
,
graphs
3200
x128
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x122
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x122
1089J
JS Minification
greedy
,
implementation
3200
x120
1045E
Ancient civilizations
constructive algorithms
,
geometry
3200
x119
744D
Hongcow Draws a Circle
geometry
3200
x117
1781H1
Window Signals (easy version)
3200
x112
645G
Armistice Area Apportionment
binary search
,
geometry
3200
x111
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x103
1267H
Help BerLine
constructive algorithms
3200
x101
1510H
Hard Optimization
dp
3200
x97
730K
Roads Orientation Problem
graphs
3200
x93
730L
Expression Queries
data structures
3200
x84
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x81
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x72
1599E
Two Arrays
data structures
,
matrices
3200
x66
1776K
Uniform Chemistry
dp
,
math
3200
x64
993F
The Moral Dilemma
3200
x59
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x54
863G
Graphic Settings
3200
x53
690F3
Tree of Life (hard)
trees
3200
x45
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x43
1578D
Dragon Curve
3200
x43
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x42
1184C3
Heidi and the Turing Test (Hard)
3200
x40
1599D
Bubble Popping
3200
x28
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x25
92114
Labyrinth-14
3200
92113
Labyrinth-13
3200
92112
Labyrinth-12
3200
92111
Labyrinth-11
3200
92110
Labyrinth-10
3200
92109
Labyrinth-9
3200
92108
Labyrinth-8
3200
92107
Labyrinth-7
3200
92106
Labyrinth-6
3200
92105
Labyrinth-5
3200
92104
Labyrinth-4
3200
92103
Labyrinth-3
3200
92102
Labyrinth-2
3200
92101
Labyrinth-1
3200
700E
Cool Slogans
string suffix structures
,
strings
3300
x1125
576E
Painting Edges
binary search
,
data structures
3300
x1105
1063F
String Journey
data structures
,
dp
,
string suffix structures
3300
x801
526G
Spiders Evil Plan
greedy
,
trees
3300
x691
582D
Number of Binominal Coefficients
dp
,
math
,
number theory
3300
x608
1270H
Number of Components
data structures
3300
x582
1307F
Cow and Vacation
dfs and similar
,
dsu
,
trees
3300
x568
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x564
623E
Transforming Sequence
combinatorics
,
dp
,
fft
,
math
3300
x533
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x525
1290E
Cartesian Tree
data structures
3300
x511
878E
Numbers on the blackboard
combinatorics
,
dp
3300
x472
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x470
1764G3
Doremy's Perfect DS Class (Hard Version)
binary search
,
interactive
3300
x432
906E
Reverses
dp
,
string suffix structures
,
strings
3300
x429
1517G
Starry Night Camping
constructive algorithms
,
flows
,
graphs
3300
x412
1172F
Nauuo and Bug
data structures
3300
x404
1523F
Favorite Game
bitmasks
,
dp
3300
x399
1375H
Set Merging
constructive algorithms
,
divide and conquer
3300
x395
671E
Organizing a Race
data structures
,
greedy
3300
x394
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x394
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x376
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x372
768G
The Winds of Winter
binary search
,
data structures
3300
x353
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x352
1558F
Strange Sort
data structures
,
sortings
3300
x350
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x342
713E
Sonya Partymaker
binary search
,
dp
3300
x342
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x329
1556H
DIY Tree
graphs
,
greedy
,
math
,
probabilities
3300
x323
983D
Arkady and Rectangles
data structures
3300
x322
1552H
Guess the Perimeter
binary search
,
interactive
,
number theory
3300
x316
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x315
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x313
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x308
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x307
1237H
Balanced Reversals
constructive algorithms
3300
x303
1396D
Rainbow Rectangles
data structures
,
sortings
,
two pointers
3300
x297
1322E
Median Mountain Range
data structures
3300
x294
1172E
Nauuo and ODT
data structures
3300
x289
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x288
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x282
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x281
1528F
AmShZ Farm
combinatorics
,
fft
,
math
3300
x274
704E
Iron Man
data structures
,
geometry
,
trees
3300
x272
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x265
1083F
The Fair Nut and Amusing Xor
data structures
3300
x265
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x261
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x261
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x259
1427G
One Billion Shades of Grey
flows
,
graphs
3300
x257
607E
Cross Sum
binary search
,
geometry
3300
x248
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