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implementation
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
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strings
ternary search
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Custom test
Problems
#
Name
1772A
A+B?
implementation
800
x43982
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x43452
1950A
Stair, Peak, or Neither?
implementation
800
x43320
1722B
Colourblindness
implementation
800
x43208
731A
Night at the Museum
implementation
,
strings
800
x43164
451B
Sort the Array
implementation
,
sortings
1300
x43035
474A
Keyboard
implementation
900
x42721
1926A
Vlad and the Best of Five
implementation
800
x41857
1791B
Following Directions
geometry
,
implementation
800
x41813
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41715
313B
Ilya and Queries
dp
,
implementation
1100
x41526
935A
Fafa and his Company
brute force
,
implementation
800
x41517
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x41475
476A
Dreamoon and Stairs
implementation
,
math
1000
x41127
1850C
Word on the Paper
implementation
,
strings
800
x40970
1829B
Blank Space
implementation
800
x40759
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40685
1791C
Prepend and Append
implementation
,
two pointers
800
x40522
233A
Perfect Permutation
implementation
,
math
800
x40410
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40334
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x39977
1462A
Favorite Sequence
implementation
,
two pointers
800
x39968
1669B
Triple
implementation
,
sortings
800
x39873
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x39869
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x38469
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38448
577A
Multiplication Table
implementation
,
number theory
1000
x38056
149A
Business trip
greedy
,
implementation
,
sortings
900
x37715
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37695
499B
Lecture
implementation
,
strings
1000
x37465
1915C
Can I Square?
binary search
,
implementation
800
x37454
509A
Maximum in Table
brute force
,
implementation
800
x37239
1097A
Gennady and a Card Game
brute force
,
implementation
800
x37009
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36782
977B
Two-gram
implementation
,
strings
900
x36769
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x36339
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36284
1186A
Vus the Cossack and a Contest
implementation
800
x36155
1607A
Linear Keyboard
implementation
,
strings
800
x36009
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x35907
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35623
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x35554
1873C
Target Practice
implementation
,
math
800
x35220
1760C
Advantage
data structures
,
implementation
,
sortings
800
x35017
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34883
1950C
Clock Conversion
implementation
,
math
800
x34635
265A
Colorful Stones (Simplified Edition)
implementation
800
x34428
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34377
1624B
Make AP
implementation
,
math
900
x34221
1703C
Cypher
brute force
,
implementation
,
strings
800
x34122
1907A
Rook
implementation
800
x33995
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33872
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33250
1950B
Upscaling
implementation
800
x33067
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x33048
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32869
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32846
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32614
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32537
450A
Jzzhu and Children
implementation
1000
x32516
1692C
Where's the Bishop?
implementation
800
x32454
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32294
1921B
Arranging Cats
greedy
,
implementation
800
x31933
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31682
1833A
Musical Puzzle
implementation
,
strings
800
x31567
540A
Combination Lock
implementation
800
x31513
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31426
459A
Pashmak and Garden
implementation
1200
x31388
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31370
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31066
1742C
Stripes
implementation
900
x30980
268B
Buttons
implementation
,
math
1000
x30860
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30697
567A
Lineland Mail
greedy
,
implementation
900
x30594
1303A
Erasing Zeroes
implementation
,
strings
800
x30513
1619B
Squares and Cubes
implementation
,
math
800
x30047
709A
Juicer
implementation
900
x30024
1800A
Is It a Cat?
implementation
,
strings
800
x29981
1547A
Shortest Path with Obstacle
implementation
,
math
800
x29885
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29822
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x29817
1926B
Vlad and Shapes
geometry
,
implementation
800
x29654
1567A
Domino Disaster
implementation
,
strings
800
x29628
1914A
Problemsolving Log
implementation
,
strings
800
x29623
1141A
Game 23
implementation
,
math
1000
x29606
1095A
Repeating Cipher
implementation
800
x29437
82A
Double Cola
implementation
,
math
1100
x29434
1722C
Word Game
data structures
,
implementation
800
x29432
1328C
Ternary XOR
greedy
,
implementation
1200
x29403
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29327
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29152
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x29122
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29012
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x28980
1632A
ABC
implementation
800
x28908
1220A
Cards
implementation
,
sortings
,
strings
800
x28824
711A
Bus to Udayland
brute force
,
implementation
800
x28812
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28797
1759A
Yes-Yes?
implementation
,
strings
800
x28762
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28702
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