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Before contest
Codeforces Round 941 (Div. 1)
27:14:42
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
27:14:42
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*has extra registration
→ Filter Problems
Difficulty:
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greedy
combine-tags-by-or
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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
231A
Team
brute force
,
greedy
800
x297883
50A
Domino piling
greedy
,
math
800
x227812
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197357
58A
Chat room
greedy
,
strings
1000
x121777
160A
Twins
greedy
,
sortings
900
x110440
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x93996
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90965
996A
Hit the Lottery
dp
,
greedy
800
x83851
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82207
337A
Puzzles
greedy
900
x75314
230A
Dragons
greedy
,
sortings
1000
x74031
1399A
Remove Smallest
greedy
,
sortings
800
x62484
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62275
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59936
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56475
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55259
1367B
Even Array
greedy
,
math
800
x50083
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48556
34B
Sale
greedy
,
sortings
900
x48401
1551A
Polycarp and Coins
greedy
,
math
800
x48202
1360A
Minimal Square
greedy
,
math
800
x47877
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47734
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47415
1472B
Fair Division
dp
,
greedy
,
math
800
x47302
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46324
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46294
1360B
Honest Coach
greedy
,
sortings
800
x45918
514A
Chewbaсca and Number
greedy
,
implementation
1200
x45376
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44884
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44295
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44090
1873B
Good Kid
brute force
,
greedy
,
math
800
x43811
1374C
Move Brackets
greedy
,
strings
1000
x43209
1857A
Array Coloring
greedy
,
math
800
x43115
1399B
Gifts Fixing
greedy
800
x42290
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41456
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x41287
1472A
Cards for Friends
greedy
,
math
800
x40751
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40603
1921A
Square
greedy
,
math
800
x39630
1807B
Grab the Candies
greedy
800
x39566
1927A
Make it White
greedy
,
strings
800
x39338
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x38890
1878A
How Much Does Daytona Cost?
greedy
800
x38358
1348A
Phoenix and Balance
greedy
,
math
800
x38302
1342A
Road To Zero
greedy
,
math
1000
x38229
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38222
1358A
Park Lighting
greedy
,
math
800
x38023
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x37998
556A
Case of the Zeros and Ones
greedy
900
x37807
149A
Business trip
greedy
,
implementation
,
sortings
900
x37591
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37118
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36664
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x36236
1385B
Restore the Permutation by Merger
greedy
800
x36225
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36158
1537A
Arithmetic Array
greedy
,
math
800
x35871
1538A
Stone Game
brute force
,
dp
,
greedy
800
x35659
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35170
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35033
1660A
Vasya and Coins
greedy
,
math
800
x34942
978B
File Name
greedy
,
strings
800
x34894
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x34890
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34761
1858A
Buttons
games
,
greedy
,
math
800
x33940
320A
Magic Numbers
brute force
,
greedy
900
x33482
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33181
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x33000
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32855
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32804
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32721
1692B
All Distinct
greedy
,
sortings
800
x32645
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x32458
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32371
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32158
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32021
1921B
Arranging Cats
greedy
,
implementation
800
x31803
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x31631
1675A
Food for Animals
greedy
,
math
800
x31401
1716A
2-3 Moves
greedy
,
math
800
x31300
1462C
Unique Number
brute force
,
greedy
,
math
900
x31134
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x30990
1538B
Friends and Candies
greedy
,
math
800
x30969
1490A
Dense Array
greedy
,
math
800
x30575
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30561
567A
Lineland Mail
greedy
,
implementation
900
x30478
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30065
1811A
Insert Digit
greedy
,
math
,
strings
800
x29941
1714C
Minimum Varied Number
greedy
800
x29872
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x29790
1931B
Make Equal
greedy
800
x29746
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29519
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29348
1328C
Ternary XOR
greedy
,
implementation
1200
x29310
1729B
Decode String
greedy
,
strings
800
x29298
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29234
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29188
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
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