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Before contest
Codeforces Round 941 (Div. 1)
26:15:48
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
26:15:48
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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
Standings
Custom test
Problems
#
Name
282A
Bit++
implementation
800
x234894
158A
Next Round
*special problem
,
implementation
800
x231593
263A
Beautiful Matrix
implementation
800
x223644
112A
Petya and Strings
implementation
,
strings
800
x208275
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197362
281A
Word Capitalization
implementation
,
strings
800
x195250
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192302
118A
String Task
implementation
,
strings
1000
x180631
791A
Bear and Big Brother
implementation
800
x177935
266A
Stones on the Table
implementation
800
x177212
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166745
59A
Word
implementation
,
strings
800
x161214
69A
Young Physicist
implementation
,
math
1000
x154476
977A
Wrong Subtraction
implementation
800
x154157
96A
Football
implementation
,
strings
900
x148497
110A
Nearly Lucky Number
implementation
800
x141875
734A
Anton and Danik
implementation
,
strings
800
x139376
41A
Translation
implementation
,
strings
800
x134288
116A
Tram
implementation
800
x131539
677A
Vanya and Fence
implementation
800
x129951
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126278
1030A
In Search of an Easy Problem
implementation
800
x119313
467A
George and Accommodation
implementation
800
x113271
344A
Magnets
implementation
800
x111218
486A
Calculating Function
implementation
,
math
800
x108885
136A
Presents
implementation
800
x108664
200B
Drinks
implementation
,
math
800
x107289
61A
Ultra-Fast Mathematician
implementation
800
x103218
228A
Is your horseshoe on the other hoof?
implementation
800
x101493
133A
HQ9+
implementation
900
x99647
705A
Hulk
implementation
800
x99038
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94001
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90967
520A
Pangram
implementation
,
strings
800
x89354
144A
Arrival of the General
implementation
800
x88643
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86810
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83671
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83555
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82209
785A
Anton and Polyhedrons
implementation
,
strings
800
x81812
131A
cAPS lOCK
implementation
,
strings
1000
x80959
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77610
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76729
510A
Fox And Snake
implementation
800
x76583
427A
Police Recruits
implementation
800
x72150
1352A
Sum of Round Numbers
implementation
,
math
800
x71481
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70891
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70531
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70374
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69591
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66964
581A
Vasya the Hipster
implementation
,
math
800
x66884
339B
Xenia and Ringroad
implementation
1000
x66214
151A
Soft Drinking
implementation
,
math
800
x65437
1742A
Sum
implementation
800
x64122
451A
Game With Sticks
implementation
900
x62440
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62132
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59940
1512A
Spy Detected!
brute force
,
implementation
800
x59637
466A
Cheap Travel
implementation
1200
x59323
1692A
Marathon
implementation
800
x59316
32B
Borze
expression parsing
,
implementation
800
x58414
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58074
1676A
Lucky?
implementation
800
x57618
758A
Holiday Of Equality
implementation
,
math
800
x57025
1669A
Division?
implementation
800
x56665
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56475
1560A
Dislike of Threes
implementation
800
x55635
1807A
Plus or Minus
implementation
800
x55271
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55259
1367A
Short Substrings
implementation
,
strings
800
x54661
1791A
Codeforces Checking
implementation
,
strings
800
x54531
313A
Ilya and Bank Account
implementation
,
number theory
900
x53406
703A
Mishka and Game
implementation
800
x53377
1760A
Medium Number
implementation
,
sortings
800
x53199
431A
Black Square
implementation
800
x51203
1850A
To My Critics
implementation
,
sortings
800
x50625
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50073
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49458
1433A
Boring Apartments
implementation
,
math
800
x49118
1915A
Odd One Out
bitmasks
,
implementation
800
x49038
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48557
1873A
Short Sort
brute force
,
implementation
800
x48278
1619A
Square String?
implementation
,
strings
800
x48063
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47737
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x47497
1722A
Spell Check
implementation
800
x46550
492A
Vanya and Cubes
implementation
800
x46521
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46295
1535A
Fair Playoff
brute force
,
implementation
800
x46128
707A
Brain's Photos
implementation
800
x46034
1829A
Love Story
implementation
,
strings
800
x45459
1426A
Floor Number
implementation
,
math
800
x45385
514A
Chewbaсca and Number
greedy
,
implementation
1200
x45378
1703B
ICPC Balloons
data structures
,
implementation
800
x45051
474B
Worms
binary search
,
implementation
1200
x44616
379A
New Year Candles
implementation
1000
x44351
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44296
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44168
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44092
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