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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
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constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
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geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x479145
71A
Way Too Long Words
strings
800
x351862
231A
Team
brute force
,
greedy
800
x297739
282A
Bit++
implementation
800
x234781
158A
Next Round
*special problem
,
implementation
800
x231499
50A
Domino piling
greedy
,
math
800
x227729
263A
Beautiful Matrix
implementation
800
x223539
112A
Petya and Strings
implementation
,
strings
800
x208187
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197287
281A
Word Capitalization
implementation
,
strings
800
x195174
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192196
791A
Bear and Big Brother
implementation
800
x177810
266A
Stones on the Table
implementation
800
x177114
617A
Elephant
math
800
x169196
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166660
59A
Word
implementation
,
strings
800
x161137
977A
Wrong Subtraction
implementation
800
x154100
110A
Nearly Lucky Number
implementation
800
x141818
734A
Anton and Danik
implementation
,
strings
800
x139266
41A
Translation
implementation
,
strings
800
x134174
116A
Tram
implementation
800
x131495
677A
Vanya and Fence
implementation
800
x129884
271A
Beautiful Year
brute force
800
x126924
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126239
1030A
In Search of an Easy Problem
implementation
800
x119226
467A
George and Accommodation
implementation
800
x113238
344A
Magnets
implementation
800
x111160
486A
Calculating Function
implementation
,
math
800
x108841
136A
Presents
implementation
800
x108615
200B
Drinks
implementation
,
math
800
x107250
61A
Ultra-Fast Mathematician
implementation
800
x103175
228A
Is your horseshoe on the other hoof?
implementation
800
x101453
705A
Hulk
implementation
800
x98981
1328A
Divisibility Problem
math
800
x92803
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90930
520A
Pangram
implementation
,
strings
800
x89315
144A
Arrival of the General
implementation
800
x88606
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86789
996A
Hit the Lottery
dp
,
greedy
800
x83811
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83517
785A
Anton and Polyhedrons
implementation
,
strings
800
x81763
268A
Games
brute force
800
x80560
1335A
Candies and Two Sisters
math
800
x78304
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77578
510A
Fox And Snake
implementation
800
x76493
427A
Police Recruits
implementation
800
x72107
1352A
Sum of Round Numbers
implementation
,
math
800
x71430
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70498
155A
I_love_\%username\%
brute force
800
x70353
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70341
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66922
581A
Vasya the Hipster
implementation
,
math
800
x66857
1154A
Restoring Three Numbers
math
800
x66100
151A
Soft Drinking
implementation
,
math
800
x65395
1742A
Sum
implementation
800
x64054
1399A
Remove Smallest
greedy
,
sortings
800
x62459
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62252
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62057
630A
Again Twenty Five!
number theory
800
x61573
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59890
1512A
Spy Detected!
brute force
,
implementation
800
x59600
1692A
Marathon
implementation
800
x59278
32B
Borze
expression parsing
,
implementation
800
x58373
1676A
Lucky?
implementation
800
x57587
758A
Holiday Of Equality
implementation
,
math
800
x56993
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56808
1669A
Division?
implementation
800
x56612
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56447
1560A
Dislike of Threes
implementation
800
x55612
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55232
1807A
Plus or Minus
implementation
800
x55218
1367A
Short Substrings
implementation
,
strings
800
x54645
1791A
Codeforces Checking
implementation
,
strings
800
x54469
1343B
Balanced Array
constructive algorithms
,
math
800
x53485
703A
Mishka and Game
implementation
800
x53359
1760A
Medium Number
implementation
,
sortings
800
x53162
9A
Die Roll
math
,
probabilities
800
x52266
431A
Black Square
implementation
800
x51177
1850A
To My Critics
implementation
,
sortings
800
x50583
1374A
Required Remainder
math
800
x50423
1367B
Even Array
greedy
,
math
800
x50065
1624A
Plus One on the Subset
math
800
x49573
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49443
80A
Panoramix's Prediction
brute force
800
x49269
1433A
Boring Apartments
implementation
,
math
800
x49102
1915A
Odd One Out
bitmasks
,
implementation
800
x48991
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48542
1873A
Short Sort
brute force
,
implementation
800
x48224
1551A
Polycarp and Coins
greedy
,
math
800
x48177
1619A
Square String?
implementation
,
strings
800
x48029
1360A
Minimal Square
greedy
,
math
800
x47864
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47399
1472B
Fair Division
dp
,
greedy
,
math
800
x47278
1722A
Spell Check
implementation
800
x46510
492A
Vanya and Cubes
implementation
800
x46494
1283A
Minutes Before the New Year
math
800
x46337
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46279
1535A
Fair Playoff
brute force
,
implementation
800
x46105
707A
Brain's Photos
implementation
800
x46018
1360B
Honest Coach
greedy
,
sortings
800
x45902
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