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Codeforces Round 940 (Div. 2) and CodeCraft-23
3 days
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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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Status
Standings
Custom test
Problems
#
Name
118B
Present from Lena
constructive algorithms
,
implementation
1000
x28192
139A
Petr and Book
implementation
1000
x28435
1141A
Game 23
implementation
,
math
1000
x29383
268B
Buttons
implementation
,
math
1000
x30741
450A
Jzzhu and Children
implementation
1000
x32327
499B
Lecture
implementation
,
strings
1000
x37281
577A
Multiplication Table
implementation
,
number theory
1000
x37876
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x39603
476A
Dreamoon and Stairs
implementation
,
math
1000
x40883
379A
New Year Candles
implementation
1000
x44267
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x49950
339B
Xenia and Ringroad
implementation
1000
x66078
131A
cAPS lOCK
implementation
,
strings
1000
x80782
69A
Young Physicist
implementation
,
math
1000
x154094
118A
String Task
implementation
,
strings
1000
x180189
648A
Наибольший подъем
constructive algorithms
,
implementation
900
x567
130A
Hexagonal numbers
*special problem
,
implementation
900
x1517
412A
Poster
greedy
,
implementation
900
x4295
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5112
48A
Rock-paper-scissors
implementation
,
schedules
900
x5589
45A
Codecraft III
implementation
900
x6293
847G
University Classes
implementation
900
x6497
793A
Oleg and shares
implementation
,
math
900
x6515
10A
Power Consumption Calculation
implementation
900
x6657
137A
Postcards and photos
implementation
900
x6864
729A
Interview with Oleg
implementation
,
strings
900
x7251
244A
Dividing Orange
implementation
900
x7723
1468N
Waste Sorting
greedy
,
implementation
900
x7874
653A
Bear and Three Balls
brute force
,
implementation
,
sortings
900
x7990
820A
Mister B and Book Reading
implementation
900
x8017
424A
Squats
implementation
900
x8158
52A
123-sequence
implementation
900
x8237
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8469
834A
The Useless Toy
implementation
900
x8482
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8499
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8526
263B
Squares
greedy
,
implementation
,
sortings
900
x8696
810A
Straight <<A>>
implementation
,
math
900
x8697
415A
Mashmokh and Lights
implementation
900
x8755
765A
Neverending competitions
implementation
,
math
900
x8842
879A
Borya's Diagnosis
implementation
900
x8945
975A
Aramic script
implementation
,
strings
900
x8948
376A
Lever
implementation
,
math
900
x9005
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9018
808A
Lucky Year
implementation
900
x9043
622B
The Time
implementation
900
x9047
631A
Interview
brute force
,
implementation
900
x9119
44A
Indian Summer
implementation
900
x9319
549A
Face Detection
implementation
,
strings
900
x9334
616A
Comparing Two Long Integers
implementation
,
strings
900
x9484
387A
George and Sleep
implementation
900
x9492
194A
Exams
implementation
,
math
900
x9606
465A
inc ARG
implementation
900
x9823
961A
Tetris
implementation
900
x9875
586A
Alena's Schedule
implementation
900
x9882
1737A
Ela Sorting Books
greedy
,
implementation
,
strings
900
x9924
870A
Search for Pretty Integers
brute force
,
implementation
900
x9934
863A
Quasi-palindrome
brute force
,
implementation
900
x9943
893A
Chess For Three
implementation
900
x9997
94A
Restoring Password
implementation
,
strings
900
x10084
989A
A Blend of Springtime
implementation
,
strings
900
x10135
373A
Collecting Beats is Fun
implementation
900
x10158
980A
Links and Pearls
implementation
,
math
900
x10223
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10232
168A
Wizards and Demonstration
implementation
,
math
900
x10268
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x10285
1150B
Tiling Challenge
greedy
,
implementation
900
x10630
369A
Valera and Plates
greedy
,
implementation
900
x10691
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x10772
1004A
Sonya and Hotels
implementation
900
x10952
408A
Line to Cashier
implementation
900
x10966
935B
Fafa and the Gates
implementation
900
x11313
545A
Toy Cars
implementation
900
x11400
1169A
Circle Metro
implementation
,
math
900
x11516
611A
New Year and Days
implementation
900
x11546
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11580
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11771
1011A
Stages
greedy
,
implementation
,
sortings
900
x11911
11A
Increasing Sequence
constructive algorithms
,
implementation
,
math
900
x12322
697A
Pineapple Incident
implementation
,
math
900
x12560
841A
Generous Kefa
brute force
,
implementation
900
x12908
892A
Greed
greedy
,
implementation
900
x13182
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13329
914A
Perfect Squares
brute force
,
implementation
,
math
900
x13696
215A
Bicycle Chain
brute force
,
implementation
900
x13854
591A
Wizards' Duel
implementation
,
math
900
x13855
839A
Arya and Bran
implementation
900
x13921
1732B
Ugu
brute force
,
dp
,
greedy
,
implementation
900
x13945
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x13947
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14230
1106C
Lunar New Year and Number Division
greedy
,
implementation
,
math
,
sortings
900
x14257
915A
Garden
implementation
900
x14330
903A
Hungry Student Problem
greedy
,
implementation
900
x14335
1025A
Doggo Recoloring
implementation
,
sortings
900
x14472
1282A
Temporarily unavailable
implementation
,
math
900
x14494
1016A
Death Note
greedy
,
implementation
,
math
900
x14640
1008A
Romaji
implementation
,
strings
900
x14711
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15119
1201A
Important Exam
implementation
,
strings
900
x15133
1904A
Forked!
brute force
,
implementation
900
x15441
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