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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
1884A
Simple Design
brute force
,
greedy
,
math
800
x17974
1883B
Chemistry
strings
900
x37222
1883A
Morning
math
800
x26634
1882A
Increasing Sequence
greedy
800
x25855
1881B
Three Threadlets
math
900
x26359
1881A
Don't Try to Count
brute force
,
strings
800
x36422
1879B
Chips on the Board
constructive algorithms
,
greedy
900
x23239
1879A
Rigged!
greedy
800
x23577
1878C
Vasilije in Cacak
math
900
x37350
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x32287
1878A
How Much Does Daytona Cost?
greedy
800
x49994
1877A
Goals of Victory
math
800
x28066
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x29181
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x37070
1873C
Target Practice
implementation
,
math
800
x45842
1873B
Good Kid
brute force
,
greedy
,
math
800
x52620
1873A
Short Sort
brute force
,
implementation
800
x58935
1872B
The Corridor or There and Back Again
greedy
,
implementation
900
x28615
1872A
Two Vessels
brute force
,
greedy
,
math
800
x40149
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x19429
1869A
Make It Zero
constructive algorithms
900
x24700
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x20419
1866A
Ambitious Kid
math
800
x27033
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20655
1863A
Channel
greedy
,
implementation
800
x18151
1862B
Sequence Game
constructive algorithms
800
x35800
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x33441
1861A
Prime Deletion
constructive algorithms
,
math
800
x24435
1860A
Not a Substring
constructive algorithms
,
strings
900
x22322
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x36060
1858A
Buttons
games
,
greedy
,
math
800
x43160
1857A
Array Coloring
greedy
,
math
800
x53271
1856B
Good Arrays
implementation
,
math
900
x25287
1856A
Tales of a Sort
implementation
800
x26999
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x29796
1855A
Dalton the Teacher
greedy
,
math
800
x28563
1853A
Desorting
brute force
,
greedy
,
math
800
x35947
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x30179
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x30144
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x41339
1850C
Word on the Paper
implementation
,
strings
800
x47052
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x44989
1850A
To My Critics
implementation
,
sortings
800
x61429
1849A
Morning Sandwich
implementation
,
math
800
x30284
1848A
Vika and Her Friends
games
,
math
900
x17302
1847A
The Man who became a God
greedy
,
sortings
800
x22274
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x27586
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x33062
1845B
Come Together
geometry
,
implementation
,
math
900
x22201
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x30548
1844A
Subtraction Game
constructive algorithms
,
games
800
x25012
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x34778
1843B
Long Long
greedy
,
math
,
two pointers
800
x29805
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x35152
1842A
Tenzing and Tsondu
games
,
math
800
x20099
1841A
Game with Board
constructive algorithms
,
games
800
x25119
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x35112
1839A
The Good Array
greedy
,
implementation
,
math
800
x17746
1838A
Blackboard List
constructive algorithms
,
math
800
x21911
1837B
Comparison String
greedy
900
x33286
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x36169
1836A
Destroyer
implementation
,
sortings
800
x20700
1834A
Unit Array
greedy
,
math
800
x27818
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x26634
1833B
Restore the Weather
greedy
,
sortings
900
x27467
1833A
Musical Puzzle
implementation
,
strings
800
x33370
1832A
New Palindrome
strings
800
x26395
1831A
Twin Permutations
constructive algorithms
800
x29948
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x29925
1829B
Blank Space
implementation
800
x51831
1829A
Love Story
implementation
,
strings
800
x56578
1828B
Permutation Swap
math
,
number theory
900
x26016
1828A
Divisible Array
constructive algorithms
,
math
800
x24174
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19959
1823B
Sort with Step
brute force
,
math
,
sortings
900
x16766
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16558
1822C
Bun Lover
math
800
x23598
1822B
Karina and Array
greedy
,
math
,
sortings
800
x25488
1822A
TubeTube Feed
brute force
,
implementation
800
x24988
1821A
Matching
combinatorics
,
math
800
x20272
1820A
Yura's New Name
implementation
,
strings
800
x16955
1818B
Indivisible
constructive algorithms
900
x15624
1818A
Politics
greedy
,
implementation
800
x13363
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x17964
1814A
Coins
implementation
,
math
800
x32500
1811A
Insert Digit
greedy
,
math
,
strings
800
x32152
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17899
1810A
Beautiful Sequence
brute force
,
greedy
800
x21070
1809A
Garland
implementation
800
x24331
1808A
Lucky Numbers
brute force
,
implementation
900
x18978
1807D
Odd Queries
data structures
,
implementation
900
x37580
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x31643
1807B
Grab the Candies
greedy
800
x44201
1807A
Plus or Minus
implementation
800
x68558
1806B
Mex Master
constructive algorithms
,
greedy
900
x18441
1806A
Walking Master
geometry
,
greedy
,
math
800
x27738
1805B
The String Has a Target
greedy
,
strings
800
x18957
1805A
We Need the Zero
bitmasks
,
brute force
800
x26442
1804A
Lame King
greedy
,
math
800
x18139
1802A
Likes
greedy
,
implementation
800
x16062
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