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Before contest
Codeforces Round 941 (Div. 1)
28:25:56
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Before contest
Codeforces Round 941 (Div. 2)
28:25:55
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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
#
Name
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35513
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x35346
1873C
Target Practice
implementation
,
math
800
x34827
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34813
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34759
265A
Colorful Stones (Simplified Edition)
implementation
800
x34229
1703C
Cypher
brute force
,
implementation
,
strings
800
x33988
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33804
1907A
Rook
implementation
800
x33726
1950C
Clock Conversion
implementation
,
math
800
x33577
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32804
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32721
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32425
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32370
1692C
Where's the Bishop?
implementation
800
x32351
1950B
Upscaling
implementation
800
x31968
1921B
Arranging Cats
greedy
,
implementation
800
x31803
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31607
1833A
Musical Puzzle
implementation
,
strings
800
x31466
540A
Combination Lock
implementation
800
x31434
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31384
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31280
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30561
1303A
Erasing Zeroes
implementation
,
strings
800
x30426
1619B
Squares and Cubes
implementation
,
math
800
x29988
1800A
Is It a Cat?
implementation
,
strings
800
x29891
1547A
Shortest Path with Obstacle
implementation
,
math
800
x29835
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x29736
1567A
Domino Disaster
implementation
,
strings
800
x29599
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29548
1914A
Problemsolving Log
implementation
,
strings
800
x29476
1095A
Repeating Cipher
implementation
800
x29360
1926B
Vlad and Shapes
geometry
,
implementation
800
x29328
1722C
Word Game
data structures
,
implementation
800
x29288
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29234
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29067
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x28958
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x28929
1632A
ABC
implementation
800
x28866
711A
Bus to Udayland
brute force
,
implementation
800
x28784
1220A
Cards
implementation
,
sortings
,
strings
800
x28777
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28679
1759A
Yes-Yes?
implementation
,
strings
800
x28677
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28594
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28477
34A
Reconnaissance 2
implementation
800
x28385
1772B
Matrix Rotation
brute force
,
implementation
800
x28121
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x27948
599A
Patrick and Shopping
implementation
800
x27756
255A
Greg's Workout
implementation
800
x27607
1454B
Unique Bid Auction
implementation
800
x27552
1788A
One and Two
brute force
,
implementation
,
math
800
x27367
330A
Cakeminator
brute force
,
implementation
800
x27367
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x26967
1849A
Morning Sandwich
implementation
,
math
800
x26930
119A
Epic Game
implementation
800
x26863
1644A
Doors and Keys
implementation
800
x26812
1721A
Image
greedy
,
implementation
800
x26561
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x26496
1003A
Polycarp's Pockets
implementation
800
x26296
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26288
1744A
Number Replacement
greedy
,
implementation
800
x26284
1487A
Arena
implementation
,
sortings
800
x26139
1560C
Infinity Table
implementation
,
math
800
x26056
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26018
1391B
Fix You
brute force
,
greedy
,
implementation
800
x25981
978A
Remove Duplicates
implementation
800
x25968
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x25964
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25926
1701A
Grass Field
implementation
800
x25810
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25737
1856A
Tales of a Sort
implementation
800
x25720
1814A
Coins
implementation
,
math
800
x25450
1697A
Parkway Walk
greedy
,
implementation
800
x25375
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25349
1651A
Playoff
implementation
800
x25310
1569A
Balanced Substring
implementation
800
x25251
1512B
Almost Rectangle
implementation
800
x24968
1690B
Array Decrements
greedy
,
implementation
800
x24586
1041A
Heist
greedy
,
implementation
,
sortings
800
x24443
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24434
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24407
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24322
1183A
Nearest Interesting Number
implementation
800
x24122
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x24101
448A
Rewards
implementation
800
x23886
1627A
Not Shading
constructive algorithms
,
implementation
800
x23774
1766A
Extremely Round
brute force
,
implementation
800
x23759
988A
Diverse Team
brute force
,
implementation
800
x23748
1778A
Flip Flop Sum
greedy
,
implementation
800
x23730
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23726
1539B
Love Song
dp
,
implementation
,
strings
800
x23726
1712A
Wonderful Permutation
greedy
,
implementation
800
x23706
1822A
TubeTube Feed
brute force
,
implementation
800
x23565
1809A
Garland
implementation
800
x23380
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23211
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23044
1923A
Moving Chips
greedy
,
implementation
800
x23037
1005A
Tanya and Stairways
implementation
800
x23002
1351A
A+B (Trial Problem)
implementation
800
x22801
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