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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
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
46A
Ball Game
brute force
,
implementation
800
x8383
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x8649
302A
Eugeny and Array
implementation
800
x8921
1054A
Elevator or Stairs?
implementation
800
x8973
426A
Sereja and Mugs
implementation
800
x9032
837A
Text Volume
implementation
800
x9245
447A
DZY Loves Hash
implementation
800
x9384
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9499
673A
Bear and Game
implementation
800
x9903
14A
Letter
implementation
800
x10063
884A
Book Reading
implementation
800
x10340
976A
Minimum Binary Number
implementation
800
x10367
954A
Diagonal Walking
implementation
800
x10377
363A
Soroban
implementation
800
x10480
1028A
Find Square
implementation
800
x10633
888A
Local Extrema
brute force
,
implementation
800
x10665
1043A
Elections
implementation
,
math
800
x10703
1786A2
Alternating Deck (hard version)
implementation
800
x11236
938A
Word Correction
implementation
800
x11262
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11356
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11389
1130A
Be Positive
implementation
800
x11448
278A
Circle Line
implementation
800
x11460
712A
Memory and Crow
implementation
,
math
800
x11521
1501A
Alexey and Train
implementation
800
x11526
1150A
Stock Arbitraging
greedy
,
implementation
800
x11613
1009A
Game Shopping
implementation
800
x11649
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x11694
811A
Vladik and Courtesy
brute force
,
implementation
800
x11706
1315A
Dead Pixel
implementation
800
x11807
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x11926
78A
Haiku
implementation
,
strings
800
x11961
1085A
Right-Left Cipher
implementation
,
strings
800
x12063
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x12173
1106A
Lunar New Year and Cross Counting
implementation
800
x12279
735A
Ostap and Grasshopper
implementation
,
strings
800
x12299
1159A
A pile of stones
implementation
,
math
800
x12336
12A
Super Agent
implementation
800
x12395
678A
Johny Likes Numbers
implementation
,
math
800
x12555
1534A
Colour the Flag
brute force
,
implementation
800
x12579
1818A
Politics
greedy
,
implementation
800
x12700
620A
Professor GukiZ's Robot
implementation
,
math
800
x12744
1099A
Snowball
implementation
800
x12755
1031A
Golden Plate
implementation
,
math
800
x12760
796A
Buying A House
brute force
,
implementation
800
x12838
49A
Sleuth
implementation
800
x12897
992A
Nastya and an Array
implementation
,
sortings
800
x12899
1143A
The Doors
implementation
800
x13084
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13122
912A
Tricky Alchemy
implementation
800
x13318
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13335
900A
Find Extra One
geometry
,
implementation
800
x13373
1523A
Game of Life
implementation
800
x13398
710A
King Moves
implementation
800
x13540
16A
Flag
implementation
800
x13582
1786A1
Non-alternating Deck (easy version)
implementation
800
x13614
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13641
688A
Opponents
implementation
800
x13708
994A
Fingerprints
implementation
800
x13888
897A
Scarborough Fair
implementation
800
x13935
831B
Keyboard Layouts
implementation
,
strings
800
x14063
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14363
1038A
Equality
implementation
,
strings
800
x14418
454A
Little Pony and Crystal Mine
implementation
800
x14530
1065A
Vasya and Chocolate
implementation
,
math
800
x14545
908A
New Year and Counting Cards
brute force
,
implementation
800
x14611
146A
Lucky Ticket
implementation
800
x14623
1307A
Cow and Haybales
greedy
,
implementation
800
x14715
104A
Blackjack
implementation
800
x14834
937A
Olympiad
implementation
,
sortings
800
x14838
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x14909
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x14963
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x14968
672A
Summer Camp
implementation
800
x15001
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15055
681A
A Good Contest
implementation
800
x15056
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15163
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15236
1243A
Maximum Square
implementation
800
x15342
1649A
Game
implementation
800
x15392
1802A
Likes
greedy
,
implementation
800
x15515
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15574
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15602
898A
Rounding
implementation
,
math
800
x15603
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x15682
1909A
Distinct Buttons
implementation
,
math
800
x15712
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15791
1672A
Log Chopping
games
,
implementation
,
math
800
x15847
401A
Vanya and Cards
implementation
,
math
800
x15871
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15877
384A
Coder
implementation
800
x15885
919A
Supermarket
brute force
,
greedy
,
implementation
800
x15898
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x15949
1092A
Uniform String
implementation
800
x15961
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16020
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16039
1136A
Nastya Is Reading a Book
implementation
800
x16125
1668A
Direction Change
implementation
,
math
800
x16150
361A
Levko and Table
constructive algorithms
,
implementation
800
x16193
987A
Infinity Gauntlet
implementation
800
x16248
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