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Before contest
Codeforces Round 941 (Div. 1)
37:38:57
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Before contest
Codeforces Round 941 (Div. 2)
37:38:57
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→ Filter Problems
Difficulty:
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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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Problems
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Custom test
Problems
#
Name
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15744
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x15667
1909A
Distinct Buttons
implementation
,
math
800
x15658
898A
Rounding
implementation
,
math
800
x15584
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15576
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15550
1802A
Likes
greedy
,
implementation
800
x15499
1649A
Game
implementation
800
x15379
1243A
Maximum Square
implementation
800
x15329
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15225
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15156
681A
A Good Contest
implementation
800
x15019
1898A
Milica and String
brute force
,
implementation
,
strings
800
x14971
672A
Summer Camp
implementation
800
x14970
1152A
Neko Finds Grapes
greedy
,
implementation
,
math
800
x14953
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x14874
937A
Olympiad
implementation
,
sortings
800
x14813
104A
Blackjack
implementation
800
x14796
1307A
Cow and Haybales
greedy
,
implementation
800
x14681
908A
New Year and Counting Cards
brute force
,
implementation
800
x14599
146A
Lucky Ticket
implementation
800
x14575
1065A
Vasya and Chocolate
implementation
,
math
800
x14528
454A
Little Pony and Crystal Mine
implementation
800
x14485
1038A
Equality
implementation
,
strings
800
x14401
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x14345
831B
Keyboard Layouts
implementation
,
strings
800
x14049
897A
Scarborough Fair
implementation
800
x13915
994A
Fingerprints
implementation
800
x13867
688A
Opponents
implementation
800
x13688
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x13618
1786A1
Non-alternating Deck (easy version)
implementation
800
x13583
16A
Flag
implementation
800
x13538
710A
King Moves
implementation
800
x13430
1523A
Game of Life
implementation
800
x13388
900A
Find Extra One
geometry
,
implementation
800
x13347
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13319
912A
Tricky Alchemy
implementation
800
x13300
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13088
1143A
The Doors
implementation
800
x12940
992A
Nastya and an Array
implementation
,
sortings
800
x12884
49A
Sleuth
implementation
800
x12854
796A
Buying A House
brute force
,
implementation
800
x12816
1031A
Golden Plate
implementation
,
math
800
x12752
1099A
Snowball
implementation
800
x12747
620A
Professor GukiZ's Robot
implementation
,
math
800
x12715
1818A
Politics
greedy
,
implementation
800
x12689
1534A
Colour the Flag
brute force
,
implementation
800
x12573
678A
Johny Likes Numbers
implementation
,
math
800
x12513
12A
Super Agent
implementation
800
x12326
1159A
A pile of stones
implementation
,
math
800
x12286
1106A
Lunar New Year and Cross Counting
implementation
800
x12275
735A
Ostap and Grasshopper
implementation
,
strings
800
x12274
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x12142
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x11922
78A
Haiku
implementation
,
strings
800
x11908
1085A
Right-Left Cipher
implementation
,
strings
800
x11859
1315A
Dead Pixel
implementation
800
x11802
811A
Vladik and Courtesy
brute force
,
implementation
800
x11686
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x11680
1009A
Game Shopping
implementation
800
x11641
1150A
Stock Arbitraging
greedy
,
implementation
800
x11600
1501A
Alexey and Train
implementation
800
x11522
712A
Memory and Crow
implementation
,
math
800
x11508
1130A
Be Positive
implementation
800
x11443
278A
Circle Line
implementation
800
x11441
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11350
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11339
1786A2
Alternating Deck (hard version)
implementation
800
x11199
938A
Word Correction
implementation
800
x11019
1043A
Elections
implementation
,
math
800
x10700
888A
Local Extrema
brute force
,
implementation
800
x10652
1028A
Find Square
implementation
800
x10623
363A
Soroban
implementation
800
x10453
954A
Diagonal Walking
implementation
800
x10366
976A
Minimum Binary Number
implementation
800
x10360
884A
Book Reading
implementation
800
x10329
14A
Letter
implementation
800
x9995
673A
Bear and Game
implementation
800
x9888
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9493
447A
DZY Loves Hash
implementation
800
x9332
837A
Text Volume
implementation
800
x9240
426A
Sereja and Mugs
implementation
800
x8974
1054A
Elevator or Stairs?
implementation
800
x8965
302A
Eugeny and Array
implementation
800
x8902
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x8640
46A
Ball Game
brute force
,
implementation
800
x8371
1075A
The King's Race
implementation
,
math
800
x8325
618A
Slime Combining
implementation
800
x8278
245A
System Administrator
implementation
800
x8271
1162A
Zoning Restrictions Again
implementation
800
x8170
177A1
Good Matrix Elements
implementation
800
x8162
873A
Chores
implementation
800
x7979
821A
Okabe and Future Gadget Laboratory
implementation
800
x7936
760A
Petr and a calendar
implementation
,
math
800
x7729
859A
Declined Finalists
greedy
,
implementation
800
x7606
1250F
Data Center
brute force
,
implementation
800
x7132
440A
Forgotten Episode
implementation
800
x7045
177A2
Good Matrix Elements
implementation
800
x7037
411A
Password Check
*special problem
,
implementation
800
x6952
658A
Bear and Reverse Radewoosh
implementation
800
x6951
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