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Before contest
Codeforces Round 941 (Div. 1)
2 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
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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
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probabilities
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shortest paths
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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x479096
71A
Way Too Long Words
strings
800
x351825
231A
Team
brute force
,
greedy
800
x297714
282A
Bit++
implementation
800
x234761
158A
Next Round
*special problem
,
implementation
800
x231488
50A
Domino piling
greedy
,
math
800
x227717
263A
Beautiful Matrix
implementation
800
x223519
112A
Petya and Strings
implementation
,
strings
800
x208172
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197273
281A
Word Capitalization
implementation
,
strings
800
x195161
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192177
791A
Bear and Big Brother
implementation
800
x177795
266A
Stones on the Table
implementation
800
x177094
617A
Elephant
math
800
x169182
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166655
59A
Word
implementation
,
strings
800
x161127
977A
Wrong Subtraction
implementation
800
x154095
110A
Nearly Lucky Number
implementation
800
x141808
734A
Anton and Danik
implementation
,
strings
800
x139253
41A
Translation
implementation
,
strings
800
x134164
116A
Tram
implementation
800
x131487
677A
Vanya and Fence
implementation
800
x129873
271A
Beautiful Year
brute force
800
x126915
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126229
1030A
In Search of an Easy Problem
implementation
800
x119213
467A
George and Accommodation
implementation
800
x113229
344A
Magnets
implementation
800
x111155
486A
Calculating Function
implementation
,
math
800
x108835
136A
Presents
implementation
800
x108606
200B
Drinks
implementation
,
math
800
x107239
61A
Ultra-Fast Mathematician
implementation
800
x103173
228A
Is your horseshoe on the other hoof?
implementation
800
x101445
705A
Hulk
implementation
800
x98974
1328A
Divisibility Problem
math
800
x92797
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90923
520A
Pangram
implementation
,
strings
800
x89307
144A
Arrival of the General
implementation
800
x88603
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86785
996A
Hit the Lottery
dp
,
greedy
800
x83804
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83511
785A
Anton and Polyhedrons
implementation
,
strings
800
x81761
268A
Games
brute force
800
x80558
1335A
Candies and Two Sisters
math
800
x78300
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77575
510A
Fox And Snake
implementation
800
x76487
427A
Police Recruits
implementation
800
x72105
1352A
Sum of Round Numbers
implementation
,
math
800
x71419
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70493
155A
I_love_\%username\%
brute force
800
x70346
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70334
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66917
581A
Vasya the Hipster
implementation
,
math
800
x66851
1154A
Restoring Three Numbers
math
800
x66095
151A
Soft Drinking
implementation
,
math
800
x65392
1742A
Sum
implementation
800
x64048
1399A
Remove Smallest
greedy
,
sortings
800
x62454
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62243
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62044
630A
Again Twenty Five!
number theory
800
x61568
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59884
1512A
Spy Detected!
brute force
,
implementation
800
x59596
1692A
Marathon
implementation
800
x59273
32B
Borze
expression parsing
,
implementation
800
x58371
1676A
Lucky?
implementation
800
x57584
758A
Holiday Of Equality
implementation
,
math
800
x56991
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56807
1669A
Division?
implementation
800
x56608
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56443
1560A
Dislike of Threes
implementation
800
x55608
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55229
1807A
Plus or Minus
implementation
800
x55216
1367A
Short Substrings
implementation
,
strings
800
x54642
1791A
Codeforces Checking
implementation
,
strings
800
x54465
1343B
Balanced Array
constructive algorithms
,
math
800
x53482
703A
Mishka and Game
implementation
800
x53355
1760A
Medium Number
implementation
,
sortings
800
x53157
9A
Die Roll
math
,
probabilities
800
x52265
431A
Black Square
implementation
800
x51174
1850A
To My Critics
implementation
,
sortings
800
x50581
1374A
Required Remainder
math
800
x50421
1367B
Even Array
greedy
,
math
800
x50062
1624A
Plus One on the Subset
math
800
x49568
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49442
80A
Panoramix's Prediction
brute force
800
x49265
1433A
Boring Apartments
implementation
,
math
800
x49100
1915A
Odd One Out
bitmasks
,
implementation
800
x48981
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48540
1873A
Short Sort
brute force
,
implementation
800
x48223
1551A
Polycarp and Coins
greedy
,
math
800
x48175
1619A
Square String?
implementation
,
strings
800
x48027
1360A
Minimal Square
greedy
,
math
800
x47863
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47396
1472B
Fair Division
dp
,
greedy
,
math
800
x47276
1722A
Spell Check
implementation
800
x46508
492A
Vanya and Cubes
implementation
800
x46493
1283A
Minutes Before the New Year
math
800
x46336
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46278
1535A
Fair Playoff
brute force
,
implementation
800
x46105
707A
Brain's Photos
implementation
800
x46016
1360B
Honest Coach
greedy
,
sortings
800
x45898
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