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Before contest
Codeforces Round 942 (Div. 1)
03:28:47
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Before contest
Codeforces Round 942 (Div. 2)
03:28:47
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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
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shortest paths
sortings
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strings
ternary search
trees
two pointers
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Problems
#
Name
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x24015
545D
Queue
greedy
,
implementation
,
sortings
1300
x24024
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24034
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24051
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x24147
1525B
Permutation Sort
constructive algorithms
,
greedy
900
x24163
1882A
Increasing Sequence
greedy
800
x24198
1945A
Setting up Camp
greedy
,
math
800
x24201
1747A
Two Groups
constructive algorithms
,
greedy
800
x24329
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24336
1471A
Strange Partition
greedy
,
math
,
number theory
900
x24434
1041A
Heist
greedy
,
implementation
,
sortings
800
x24454
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x24509
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24534
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x24555
1358B
Maria Breaks the Self-isolation
greedy
,
sortings
1000
x24591
1675B
Make It Increasing
greedy
,
implementation
900
x24592
1690B
Array Decrements
greedy
,
implementation
800
x24596
1481A
Space Navigation
greedy
,
strings
800
x24642
1486A
Shifting Stacks
greedy
,
implementation
900
x24769
1705A
Mark the Photographer
greedy
,
sortings
800
x24793
439A
Devu, the Singer and Churu, the Joker
greedy
,
implementation
900
x24839
1355B
Young Explorers
dp
,
greedy
,
sortings
1200
x24847
1901A
Line Trip
greedy
,
math
800
x24886
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x24911
1517A
Sum of 2050
greedy
,
math
800
x25079
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x25102
1334B
Middle Class
greedy
,
sortings
1100
x25148
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25173
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25306
1833B
Restore the Weather
greedy
,
sortings
900
x25317
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25362
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25366
1697A
Parkway Walk
greedy
,
implementation
800
x25382
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25408
1697B
Promo
greedy
,
sortings
900
x25424
1791E
Negatives and Positives
dp
,
greedy
,
sortings
1100
x25454
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25469
1550B
Maximum Cost Deletion
greedy
,
math
1000
x25673
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x25692
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x25770
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25837
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25944
1469B
Red and Blue
dp
,
greedy
1000
x25999
1391B
Fix You
brute force
,
greedy
,
implementation
800
x25999
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x26022
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26083
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x26092
1385C
Make It Good
greedy
1200
x26131
545C
Woodcutters
dp
,
greedy
1500
x26176
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x26251
1537C
Challenging Cliffs
constructive algorithms
,
greedy
,
implementation
,
math
1200
x26264
1744A
Number Replacement
greedy
,
implementation
800
x26303
1543A
Exciting Bets
greedy
,
math
,
number theory
900
x26309
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x26347
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26389
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26393
1837B
Comparison String
greedy
900
x26410
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x26476
1872B
The Corridor or There and Back Again
greedy
,
implementation
900
x26511
1721A
Image
greedy
,
implementation
800
x26573
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x26624
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x26763
1702B
Polycarp Writes a String from Memory
greedy
800
x26876
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26877
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x27008
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27043
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27052
1792A
GamingForces
greedy
,
sortings
800
x27099
1855A
Dalton the Teacher
greedy
,
math
800
x27118
1921C
Sending Messages
greedy
,
math
900
x27129
1511A
Review Site
greedy
800
x27138
1421A
XORwice
bitmasks
,
greedy
,
math
800
x27180
276B
Little Girl and Game
games
,
greedy
1300
x27189
1633B
Minority
greedy
800
x27194
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x27448
1550A
Find The Array
greedy
,
math
800
x27611
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27715
1853A
Desorting
brute force
,
greedy
,
math
800
x27797
1537B
Bad Boy
constructive algorithms
,
greedy
,
math
900
x27878
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27942
1843B
Long Long
greedy
,
math
,
two pointers
800
x27961
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x27961
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27995
1397A
Juggling Letters
greedy
,
strings
800
x28098
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28215
479C
Exams
greedy
,
sortings
1400
x28484
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28501
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x28529
1554A
Cherry
greedy
800
x28557
1631A
Min Max Swap
greedy
800
x28620
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x28620
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28631
349A
Cinema Line
greedy
,
implementation
1100
x28653
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28708
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28718
1919B
Plus-Minus Split
greedy
800
x28732
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x28734
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x28907
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x28957
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