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Before contest
Codeforces Round 941 (Div. 1)
00:17:55
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Before contest
Codeforces Round 941 (Div. 2)
00:17:55
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→ Filter Problems
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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
1512B
Almost Rectangle
implementation
800
x24975
1569A
Balanced Substring
implementation
800
x25253
1651A
Playoff
implementation
800
x25317
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25357
1697A
Parkway Walk
greedy
,
implementation
800
x25380
1814A
Coins
implementation
,
math
800
x25473
1856A
Tales of a Sort
implementation
800
x25723
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25749
1701A
Grass Field
implementation
800
x25814
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25936
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x25973
1391B
Fix You
brute force
,
greedy
,
implementation
800
x25989
978A
Remove Duplicates
implementation
800
x25994
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26032
1560C
Infinity Table
implementation
,
math
800
x26062
1487A
Arena
implementation
,
sortings
800
x26140
1744A
Number Replacement
greedy
,
implementation
800
x26288
1003A
Polycarp's Pockets
implementation
800
x26305
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26327
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x26501
1721A
Image
greedy
,
implementation
800
x26566
1644A
Doors and Keys
implementation
800
x26817
119A
Epic Game
implementation
800
x26868
1849A
Morning Sandwich
implementation
,
math
800
x26937
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x26977
330A
Cakeminator
brute force
,
implementation
800
x27375
1788A
One and Two
brute force
,
implementation
,
math
800
x27393
1454B
Unique Bid Auction
implementation
800
x27561
255A
Greg's Workout
implementation
800
x27618
599A
Patrick and Shopping
implementation
800
x27761
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x27952
1772B
Matrix Rotation
brute force
,
implementation
800
x28125
34A
Reconnaissance 2
implementation
800
x28392
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28489
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28612
1759A
Yes-Yes?
implementation
,
strings
800
x28690
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28694
1220A
Cards
implementation
,
sortings
,
strings
800
x28788
711A
Bus to Udayland
brute force
,
implementation
800
x28790
1632A
ABC
implementation
800
x28872
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x28937
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x28959
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29073
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29248
1722C
Word Game
data structures
,
implementation
800
x29329
1095A
Repeating Cipher
implementation
800
x29365
1926B
Vlad and Shapes
geometry
,
implementation
800
x29396
1914A
Problemsolving Log
implementation
,
strings
800
x29491
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29569
1567A
Domino Disaster
implementation
,
strings
800
x29601
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x29747
1547A
Shortest Path with Obstacle
implementation
,
math
800
x29847
1800A
Is It a Cat?
implementation
,
strings
800
x29899
1619B
Squares and Cubes
implementation
,
math
800
x29990
1303A
Erasing Zeroes
implementation
,
strings
800
x30432
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30582
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31293
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31393
540A
Combination Lock
implementation
800
x31442
1833A
Musical Puzzle
implementation
,
strings
800
x31476
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31613
1921B
Arranging Cats
greedy
,
implementation
800
x31815
1950B
Upscaling
implementation
800
x32133
1692C
Where's the Bishop?
implementation
800
x32365
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32402
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32437
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32740
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32807
1950C
Clock Conversion
implementation
,
math
800
x33717
1907A
Rook
implementation
800
x33764
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33814
1703C
Cypher
brute force
,
implementation
,
strings
800
x34003
265A
Colorful Stones (Simplified Edition)
implementation
800
x34248
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34775
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34825
1873C
Target Practice
implementation
,
math
800
x34884
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x35366
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35521
1607A
Linear Keyboard
implementation
,
strings
800
x35947
1186A
Vus the Cossack and a Contest
implementation
800
x36068
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36677
1097A
Gennady and a Card Game
brute force
,
implementation
800
x36932
1915C
Can I Square?
binary search
,
implementation
800
x37115
509A
Maximum in Table
brute force
,
implementation
800
x37187
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38150
1669B
Triple
implementation
,
sortings
800
x39668
1462A
Favorite Sequence
implementation
,
two pointers
800
x39813
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40115
1791C
Prepend and Append
implementation
,
two pointers
800
x40221
233A
Perfect Permutation
implementation
,
math
800
x40304
1829B
Blank Space
implementation
800
x40463
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40614
1850C
Word on the Paper
implementation
,
strings
800
x40724
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x41306
1926A
Vlad and the Best of Five
implementation
800
x41337
935A
Fafa and his Company
brute force
,
implementation
800
x41435
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41498
1791B
Following Directions
geometry
,
implementation
800
x41627
1950A
Stair, Peak, or Neither?
implementation
800
x41928
731A
Night at the Museum
implementation
,
strings
800
x42984
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