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Before contest
Codeforces Round 941 (Div. 1)
2 days
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
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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
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Status
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Custom test
Problems
#
Name
1956B
Nene and the Card Game
games
,
greedy
800
x17308
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17453
1955A
Yogurt Sale
math
800
x33596
1950C
Clock Conversion
implementation
,
math
800
x33493
1950B
Upscaling
implementation
800
x31877
1950A
Stair, Peak, or Neither?
implementation
800
x41591
1948A
Special Characters
brute force
,
constructive algorithms
800
x25748
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x22987
1945A
Setting up Camp
greedy
,
math
800
x23912
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20652
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x15255
1941A
Rudolf and the Ticket
brute force
,
math
800
x38321
1937A
Shuffle Party
implementation
,
math
800
x21189
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x25151
1934A
Too Min Too Max
greedy
,
math
800
x23062
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29528
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x34996
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26260
1931B
Make Equal
greedy
800
x29709
1931A
Recovering a Small String
brute force
,
strings
800
x33263
1930A
Maximise The Score
greedy
,
sortings
800
x16951
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23592
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28647
1928A
Rectangle Cutting
geometry
,
math
800
x20957
1927A
Make it White
greedy
,
strings
800
x39309
1926B
Vlad and Shapes
geometry
,
implementation
800
x29299
1926A
Vlad and the Best of Five
implementation
800
x41164
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x26997
1923A
Moving Chips
greedy
,
implementation
800
x23016
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25724
1921B
Arranging Cats
greedy
,
implementation
800
x31796
1921A
Square
greedy
,
math
800
x39607
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26349
1919B
Plus-Minus Split
greedy
800
x28704
1919A
Wallet Exchange
games
,
math
800
x31558
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28574
1917A
Least Product
constructive algorithms
,
math
800
x24047
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24424
1915C
Can I Square?
binary search
,
implementation
800
x37053
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38095
1915A
Odd One Out
bitmasks
,
implementation
800
x48991
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x28365
1914A
Problemsolving Log
implementation
,
strings
800
x29461
1913A
Rating Increase
implementation
800
x22161
1912L
LOL Lovers
strings
800
x6234
1909A
Distinct Buttons
implementation
,
math
800
x15655
1907A
Rook
implementation
800
x33711
1905A
Constructive Problems
constructive algorithms
,
math
800
x21687
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x23548
1902A
Binary Imbalance
constructive algorithms
800
x19628
1901A
Line Trip
greedy
,
math
800
x24731
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x21486
1899A
Game with Integers
games
,
math
,
number theory
800
x37188
1898A
Milica and String
brute force
,
implementation
,
strings
800
x14966
1896A
Jagged Swaps
sortings
800
x18283
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19575
1895A
Treasure Chest
math
800
x23319
1894A
Secret Sport
implementation
,
strings
800
x17967
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18298
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x16578
1890A
Doremy's Paint 3
constructive algorithms
800
x21087
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x24415
1884A
Simple Design
brute force
,
greedy
,
math
800
x16383
1883A
Morning
math
800
x23681
1882A
Increasing Sequence
greedy
800
x24158
1881A
Don't Try to Count
brute force
,
strings
800
x27049
1879A
Rigged!
greedy
800
x21971
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x29700
1878A
How Much Does Daytona Cost?
greedy
800
x38324
1877A
Goals of Victory
math
800
x18436
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32352
1873C
Target Practice
implementation
,
math
800
x34799
1873B
Good Kid
brute force
,
greedy
,
math
800
x43784
1873A
Short Sort
brute force
,
implementation
800
x48224
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37105
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x18434
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19134
1866A
Ambitious Kid
math
800
x17689
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x19724
1863A
Channel
greedy
,
implementation
800
x17398
1862B
Sequence Game
constructive algorithms
800
x28397
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30555
1861A
Prime Deletion
constructive algorithms
,
math
800
x23023
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x29041
1858A
Buttons
games
,
greedy
,
math
800
x33917
1857A
Array Coloring
greedy
,
math
800
x43079
1856A
Tales of a Sort
implementation
800
x25714
1855A
Dalton the Teacher
greedy
,
math
800
x27067
1853A
Desorting
brute force
,
greedy
,
math
800
x27714
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27939
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x28526
1850C
Word on the Paper
implementation
,
strings
800
x40667
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40082
1850A
To My Critics
implementation
,
sortings
800
x50583
1849A
Morning Sandwich
implementation
,
math
800
x26920
1847A
The Man who became a God
greedy
,
sortings
800
x21617
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x25958
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31270
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24387
1844A
Subtraction Game
constructive algorithms
,
games
800
x23787
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