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Before contest
Codeforces Round 941 (Div. 1)
37:37:37
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
37:37:37
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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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Custom test
Problems
#
Name
1829A
Love Story
implementation
,
strings
800
x45432
1426A
Floor Number
implementation
,
math
800
x45382
1703B
ICPC Balloons
data structures
,
implementation
800
x45043
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44880
1371A
Magical Sticks
math
800
x44171
1294A
Collecting Coins
math
800
x44137
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44079
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x43908
1873B
Good Kid
brute force
,
greedy
,
math
800
x43799
1772A
A+B?
implementation
800
x43706
1857A
Array Coloring
greedy
,
math
800
x43103
1722B
Colourblindness
implementation
800
x42979
731A
Night at the Museum
implementation
,
strings
800
x42958
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42679
1399B
Gifts Fixing
greedy
800
x42290
1542A
Odd Set
math
800
x42093
1950A
Stair, Peak, or Neither?
implementation
800
x41692
1791B
Following Directions
geometry
,
implementation
800
x41605
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41453
935A
Fafa and his Company
brute force
,
implementation
800
x41424
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x41282
1926A
Vlad and the Best of Five
implementation
800
x41221
1472A
Cards for Friends
greedy
,
math
800
x40747
1850C
Word on the Paper
implementation
,
strings
800
x40679
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40599
1829B
Blank Space
implementation
800
x40393
233A
Perfect Permutation
implementation
,
math
800
x40291
1791C
Prepend and Append
implementation
,
two pointers
800
x40158
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40092
1462A
Favorite Sequence
implementation
,
two pointers
800
x39800
1921A
Square
greedy
,
math
800
x39622
1669B
Triple
implementation
,
sortings
800
x39618
1807B
Grab the Candies
greedy
800
x39563
1296A
Array with Odd Sum
math
800
x39336
1927A
Make it White
greedy
,
strings
800
x39328
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x38927
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x38886
1729A
Two Elevators
math
800
x38760
1941A
Rudolf and the Ticket
brute force
,
math
800
x38351
1878A
How Much Does Daytona Cost?
greedy
800
x38342
1348A
Phoenix and Balance
greedy
,
math
800
x38299
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38218
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38116
1358A
Park Lighting
greedy
,
math
800
x38019
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x37993
1579A
Casimir's String Solitaire
math
,
strings
800
x37713
1385A
Three Pairwise Maximums
math
800
x37483
1899A
Game with Integers
games
,
math
,
number theory
800
x37220
509A
Maximum in Table
brute force
,
implementation
800
x37179
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37114
1915C
Can I Square?
binary search
,
implementation
800
x37077
1097A
Gennady and a Card Game
brute force
,
implementation
800
x36919
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36660
1385B
Restore the Permutation by Merger
greedy
800
x36222
1186A
Vus the Cossack and a Contest
implementation
800
x36060
1607A
Linear Keyboard
implementation
,
strings
800
x35924
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x35914
1537A
Arithmetic Array
greedy
,
math
800
x35866
1538A
Stone Game
brute force
,
dp
,
greedy
800
x35657
1369A
FashionabLee
geometry
,
math
800
x35516
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35512
1593A
Elections
math
800
x35433
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x35345
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35015
1660A
Vasya and Coins
greedy
,
math
800
x34940
978B
File Name
greedy
,
strings
800
x34892
1873C
Target Practice
implementation
,
math
800
x34822
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34809
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34759
1560B
Who's Opposite?
math
800
x34632
265A
Colorful Stones (Simplified Edition)
implementation
800
x34226
1703C
Cypher
brute force
,
implementation
,
strings
800
x33984
1858A
Buttons
games
,
greedy
,
math
800
x33932
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33801
1527A
And Then There Were K
bitmasks
800
x33797
1955A
Yogurt Sale
math
800
x33747
1907A
Rook
implementation
800
x33721
1950C
Clock Conversion
implementation
,
math
800
x33551
214A
System of Equations
brute force
800
x33538
1702A
Round Down the Price
constructive algorithms
800
x33342
1931A
Recovering a Small String
brute force
,
strings
800
x33275
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32849
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32800
894A
QAQ
brute force
,
dp
800
x32790
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32716
1692B
All Distinct
greedy
,
sortings
800
x32642
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x32456
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32422
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32362
1692C
Where's the Bishop?
implementation
800
x32350
1950B
Upscaling
implementation
800
x31931
1921B
Arranging Cats
greedy
,
implementation
800
x31800
1633A
Div. 7
brute force
800
x31796
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31605
1919A
Wallet Exchange
games
,
math
800
x31563
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x31481
1833A
Musical Puzzle
implementation
,
strings
800
x31465
540A
Combination Lock
implementation
800
x31432
1675A
Food for Animals
greedy
,
math
800
x31400
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31383
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