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Before contest
Codeforces Round 941 (Div. 1)
3 days
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
3 days
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→ Filter Problems
Difficulty:
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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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Status
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Custom test
Problems
#
Name
282A
Bit++
implementation
800
x234676
158A
Next Round
*special problem
,
implementation
800
x231414
263A
Beautiful Matrix
implementation
800
x223452
112A
Petya and Strings
implementation
,
strings
800
x208106
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197211
281A
Word Capitalization
implementation
,
strings
800
x195106
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192094
791A
Bear and Big Brother
implementation
800
x177729
266A
Stones on the Table
implementation
800
x177037
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166597
59A
Word
implementation
,
strings
800
x161062
977A
Wrong Subtraction
implementation
800
x154040
110A
Nearly Lucky Number
implementation
800
x141761
734A
Anton and Danik
implementation
,
strings
800
x139190
41A
Translation
implementation
,
strings
800
x134114
116A
Tram
implementation
800
x131463
677A
Vanya and Fence
implementation
800
x129810
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126206
1030A
In Search of an Easy Problem
implementation
800
x119174
467A
George and Accommodation
implementation
800
x113201
344A
Magnets
implementation
800
x111111
486A
Calculating Function
implementation
,
math
800
x108799
136A
Presents
implementation
800
x108559
200B
Drinks
implementation
,
math
800
x107198
61A
Ultra-Fast Mathematician
implementation
800
x103147
228A
Is your horseshoe on the other hoof?
implementation
800
x101402
705A
Hulk
implementation
800
x98950
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90898
520A
Pangram
implementation
,
strings
800
x89266
144A
Arrival of the General
implementation
800
x88585
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86766
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83494
785A
Anton and Polyhedrons
implementation
,
strings
800
x81737
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77553
510A
Fox And Snake
implementation
800
x76461
427A
Police Recruits
implementation
800
x72077
1352A
Sum of Round Numbers
implementation
,
math
800
x71392
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70469
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70304
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66889
581A
Vasya the Hipster
implementation
,
math
800
x66836
151A
Soft Drinking
implementation
,
math
800
x65366
1742A
Sum
implementation
800
x64023
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62015
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59859
1512A
Spy Detected!
brute force
,
implementation
800
x59570
1692A
Marathon
implementation
800
x59244
32B
Borze
expression parsing
,
implementation
800
x58354
1676A
Lucky?
implementation
800
x57562
758A
Holiday Of Equality
implementation
,
math
800
x56977
1669A
Division?
implementation
800
x56588
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56426
1560A
Dislike of Threes
implementation
800
x55593
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55218
1807A
Plus or Minus
implementation
800
x55193
1367A
Short Substrings
implementation
,
strings
800
x54629
1791A
Codeforces Checking
implementation
,
strings
800
x54441
703A
Mishka and Game
implementation
800
x53346
1760A
Medium Number
implementation
,
sortings
800
x53133
431A
Black Square
implementation
800
x51153
1850A
To My Critics
implementation
,
sortings
800
x50556
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49434
1433A
Boring Apartments
implementation
,
math
800
x49089
1915A
Odd One Out
bitmasks
,
implementation
800
x48950
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48529
1873A
Short Sort
brute force
,
implementation
800
x48202
1619A
Square String?
implementation
,
strings
800
x48013
1722A
Spell Check
implementation
800
x46495
492A
Vanya and Cubes
implementation
800
x46483
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46275
1535A
Fair Playoff
brute force
,
implementation
800
x46096
707A
Brain's Photos
implementation
800
x45995
1829A
Love Story
implementation
,
strings
800
x45380
1426A
Floor Number
implementation
,
math
800
x45362
1703B
ICPC Balloons
data structures
,
implementation
800
x44976
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44037
1772A
A+B?
implementation
800
x43683
1722B
Colourblindness
implementation
800
x42954
731A
Night at the Museum
implementation
,
strings
800
x42926
1791B
Following Directions
geometry
,
implementation
800
x41567
1950A
Stair, Peak, or Neither?
implementation
800
x41435
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41413
935A
Fafa and his Company
brute force
,
implementation
800
x41409
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x41249
1926A
Vlad and the Best of Five
implementation
800
x41123
1850C
Word on the Paper
implementation
,
strings
800
x40646
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40582
1829B
Blank Space
implementation
800
x40349
233A
Perfect Permutation
implementation
,
math
800
x40276
1791C
Prepend and Append
implementation
,
two pointers
800
x40097
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40063
1462A
Favorite Sequence
implementation
,
two pointers
800
x39779
1669B
Triple
implementation
,
sortings
800
x39554
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38073
509A
Maximum in Table
brute force
,
implementation
800
x37174
1915C
Can I Square?
binary search
,
implementation
800
x37036
1097A
Gennady and a Card Game
brute force
,
implementation
800
x36906
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36624
1186A
Vus the Cossack and a Contest
implementation
800
x36041
1607A
Linear Keyboard
implementation
,
strings
800
x35916
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