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Before contest
Codeforces Round 942 (Div. 1)
05:36:23
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Before contest
Codeforces Round 942 (Div. 2)
05:36:24
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→ Filter Problems
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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
x235339
158A
Next Round
*special problem
,
implementation
800
x231878
263A
Beautiful Matrix
implementation
800
x224002
112A
Petya and Strings
implementation
,
strings
800
x208593
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197678
281A
Word Capitalization
implementation
,
strings
800
x195533
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192649
118A
String Task
implementation
,
strings
1000
x180852
791A
Bear and Big Brother
implementation
800
x178265
266A
Stones on the Table
implementation
800
x177551
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x167096
59A
Word
implementation
,
strings
800
x161498
69A
Young Physicist
implementation
,
math
1000
x154661
977A
Wrong Subtraction
implementation
800
x154399
96A
Football
implementation
,
strings
900
x148686
110A
Nearly Lucky Number
implementation
800
x142100
734A
Anton and Danik
implementation
,
strings
800
x139710
41A
Translation
implementation
,
strings
800
x134510
116A
Tram
implementation
800
x131690
677A
Vanya and Fence
implementation
800
x130207
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126425
1030A
In Search of an Easy Problem
implementation
800
x119530
467A
George and Accommodation
implementation
800
x113419
344A
Magnets
implementation
800
x111410
486A
Calculating Function
implementation
,
math
800
x109065
136A
Presents
implementation
800
x108813
200B
Drinks
implementation
,
math
800
x107429
61A
Ultra-Fast Mathematician
implementation
800
x103335
228A
Is your horseshoe on the other hoof?
implementation
800
x101650
133A
HQ9+
implementation
900
x99739
705A
Hulk
implementation
800
x99158
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94157
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91101
520A
Pangram
implementation
,
strings
800
x89512
144A
Arrival of the General
implementation
800
x88743
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86906
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83753
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83671
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82283
785A
Anton and Polyhedrons
implementation
,
strings
800
x81952
131A
cAPS lOCK
implementation
,
strings
1000
x81046
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77699
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76862
510A
Fox And Snake
implementation
800
x76740
427A
Police Recruits
implementation
800
x72247
1352A
Sum of Round Numbers
implementation
,
math
800
x71616
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70959
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70621
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70518
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69672
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67086
581A
Vasya the Hipster
implementation
,
math
800
x66969
339B
Xenia and Ringroad
implementation
1000
x66261
151A
Soft Drinking
implementation
,
math
800
x65542
1742A
Sum
implementation
800
x64272
451A
Game With Sticks
implementation
900
x62501
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62293
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60097
1512A
Spy Detected!
brute force
,
implementation
800
x59743
1692A
Marathon
implementation
800
x59403
466A
Cheap Travel
implementation
1200
x59395
32B
Borze
expression parsing
,
implementation
800
x58490
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58165
1676A
Lucky?
implementation
800
x57725
758A
Holiday Of Equality
implementation
,
math
800
x57113
1669A
Division?
implementation
800
x56805
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56531
1560A
Dislike of Threes
implementation
800
x55708
1807A
Plus or Minus
implementation
800
x55384
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55369
1367A
Short Substrings
implementation
,
strings
800
x54729
1791A
Codeforces Checking
implementation
,
strings
800
x54640
313A
Ilya and Bank Account
implementation
,
number theory
900
x53464
703A
Mishka and Game
implementation
800
x53442
1760A
Medium Number
implementation
,
sortings
800
x53324
431A
Black Square
implementation
800
x51300
1850A
To My Critics
implementation
,
sortings
800
x50770
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50121
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49507
1915A
Odd One Out
bitmasks
,
implementation
800
x49188
1433A
Boring Apartments
implementation
,
math
800
x49176
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48596
1873A
Short Sort
brute force
,
implementation
800
x48405
1619A
Square String?
implementation
,
strings
800
x48380
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47784
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x47590
1722A
Spell Check
implementation
800
x46623
492A
Vanya and Cubes
implementation
800
x46589
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46347
1535A
Fair Playoff
brute force
,
implementation
800
x46193
707A
Brain's Photos
implementation
800
x46104
1829A
Love Story
implementation
,
strings
800
x45609
514A
Chewbaсca and Number
greedy
,
implementation
1200
x45469
1426A
Floor Number
implementation
,
math
800
x45425
1703B
ICPC Balloons
data structures
,
implementation
800
x45134
474B
Worms
binary search
,
implementation
1200
x44682
379A
New Year Candles
implementation
1000
x44380
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44324
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44196
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44163
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