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Before contest
Codeforces Round 942 (Div. 1)
03:28:40
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Before contest
Codeforces Round 942 (Div. 2)
03:28:41
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→ Filter Problems
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combine-tags-by-or
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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
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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Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x480085
71A
Way Too Long Words
strings
800
x352579
231A
Team
brute force
,
greedy
800
x298334
282A
Bit++
implementation
800
x235356
158A
Next Round
*special problem
,
implementation
800
x231885
50A
Domino piling
greedy
,
math
800
x228133
263A
Beautiful Matrix
implementation
800
x224014
112A
Petya and Strings
implementation
,
strings
800
x208599
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197687
281A
Word Capitalization
implementation
,
strings
800
x195546
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192662
791A
Bear and Big Brother
implementation
800
x178280
266A
Stones on the Table
implementation
800
x177562
617A
Elephant
math
800
x169586
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x167103
59A
Word
implementation
,
strings
800
x161502
977A
Wrong Subtraction
implementation
800
x154406
110A
Nearly Lucky Number
implementation
800
x142105
734A
Anton and Danik
implementation
,
strings
800
x139716
41A
Translation
implementation
,
strings
800
x134514
116A
Tram
implementation
800
x131694
677A
Vanya and Fence
implementation
800
x130213
271A
Beautiful Year
brute force
800
x127157
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126429
1030A
In Search of an Easy Problem
implementation
800
x119538
467A
George and Accommodation
implementation
800
x113427
344A
Magnets
implementation
800
x111413
486A
Calculating Function
implementation
,
math
800
x109067
136A
Presents
implementation
800
x108819
200B
Drinks
implementation
,
math
800
x107434
61A
Ultra-Fast Mathematician
implementation
800
x103340
228A
Is your horseshoe on the other hoof?
implementation
800
x101654
705A
Hulk
implementation
800
x99162
1328A
Divisibility Problem
math
800
x93007
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91102
520A
Pangram
implementation
,
strings
800
x89520
144A
Arrival of the General
implementation
800
x88745
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86908
996A
Hit the Lottery
dp
,
greedy
800
x83967
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83675
785A
Anton and Polyhedrons
implementation
,
strings
800
x81954
268A
Games
brute force
800
x80716
1335A
Candies and Two Sisters
math
800
x78434
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77701
510A
Fox And Snake
implementation
800
x76747
427A
Police Recruits
implementation
800
x72250
1352A
Sum of Round Numbers
implementation
,
math
800
x71619
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70623
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70522
155A
I_love_\%username\%
brute force
800
x70436
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67086
581A
Vasya the Hipster
implementation
,
math
800
x66969
1154A
Restoring Three Numbers
math
800
x66207
151A
Soft Drinking
implementation
,
math
800
x65542
1742A
Sum
implementation
800
x64277
1399A
Remove Smallest
greedy
,
sortings
800
x62577
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62351
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62299
630A
Again Twenty Five!
number theory
800
x61762
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60101
1512A
Spy Detected!
brute force
,
implementation
800
x59748
1692A
Marathon
implementation
800
x59407
32B
Borze
expression parsing
,
implementation
800
x58490
1676A
Lucky?
implementation
800
x57725
758A
Holiday Of Equality
implementation
,
math
800
x57116
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56880
1669A
Division?
implementation
800
x56807
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56531
1560A
Dislike of Threes
implementation
800
x55712
1807A
Plus or Minus
implementation
800
x55390
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55371
1367A
Short Substrings
implementation
,
strings
800
x54729
1791A
Codeforces Checking
implementation
,
strings
800
x54643
1343B
Balanced Array
constructive algorithms
,
math
800
x53558
703A
Mishka and Game
implementation
800
x53442
1760A
Medium Number
implementation
,
sortings
800
x53331
9A
Die Roll
math
,
probabilities
800
x52377
431A
Black Square
implementation
800
x51302
1850A
To My Critics
implementation
,
sortings
800
x50774
1374A
Required Remainder
math
800
x50487
1367B
Even Array
greedy
,
math
800
x50135
1624A
Plus One on the Subset
math
800
x49649
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49508
80A
Panoramix's Prediction
brute force
800
x49361
1915A
Odd One Out
bitmasks
,
implementation
800
x49193
1433A
Boring Apartments
implementation
,
math
800
x49177
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48598
1873A
Short Sort
brute force
,
implementation
800
x48406
1619A
Square String?
implementation
,
strings
800
x48380
1551A
Polycarp and Coins
greedy
,
math
800
x48280
1360A
Minimal Square
greedy
,
math
800
x47929
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47453
1472B
Fair Division
dp
,
greedy
,
math
800
x47376
1722A
Spell Check
implementation
800
x46623
492A
Vanya and Cubes
implementation
800
x46589
1283A
Minutes Before the New Year
math
800
x46405
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46347
1535A
Fair Playoff
brute force
,
implementation
800
x46197
707A
Brain's Photos
implementation
800
x46106
1360B
Honest Coach
greedy
,
sortings
800
x45981
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