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Before contest
Codeforces Round 941 (Div. 1)
02:37:59
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Before contest
Codeforces Round 941 (Div. 2)
02:37:59
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→ Filter Problems
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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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Custom test
Problems
#
Name
1115G1
AND oracle
*special problem
1100
x381
188D
Asterisks
*special problem
,
implementation
1100
x647
188A
Hexagonal Numbers
*special problem
1100
x752
162A
Pentagonal numbers
*special problem
,
implementation
1100
x789
648C
Путь Робота
constructive algorithms
,
dfs and similar
,
graphs
1100
x833
100A
Carpeting the Room
*special problem
,
implementation
1100
x883
1001A
Generate plus state or minus state
*special problem
1100
x1002
178A3
Educational Game
greedy
1100
x1391
1910A
Username
*special problem
,
implementation
1100
x1536
316A1
Special Task
greedy
1100
x2579
174A
Problem About Equation
math
1100
x2593
292A
SMSC
implementation
1100
x2634
690A1
Collective Mindsets (easy)
1100
x2761
635A
Orchestra
brute force
,
implementation
1100
x2818
169B
Replacing Digits
greedy
1100
x3189
120B
Quiz League
implementation
1100
x3333
1231C
Increasing Matrix
greedy
1100
x3462
883M
Quadcopter Competition
greedy
,
math
1100
x3489
46B
T-shirts from Sponsor
implementation
1100
x3528
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3575
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3667
39D
Cubical Planet
math
1100
x3735
638A
Home Numbers
*special problem
,
constructive algorithms
,
math
1100
x3749
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4214
967A
Mind the Gap
implementation
1100
x4277
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4426
366A
Dima and Guards
implementation
1100
x4477
402A
Nuts
greedy
,
math
1100
x4506
136B
Ternary Logic
implementation
,
math
1100
x4640
475A
Bayan Bus
implementation
1100
x4680
68A
Irrational problem
implementation
,
number theory
1100
x4799
53A
Autocomplete
implementation
1100
x4819
1070K
Video Posts
implementation
1100
x4826
312A
Whose sentence is it?
implementation
,
strings
1100
x4846
813A
The Contest
implementation
1100
x5007
245B
Internet Address
implementation
,
strings
1100
x5118
90B
African Crossword
implementation
,
strings
1100
x5144
252A
Little Xor
brute force
,
implementation
1100
x5156
196A
Lexicographically Maximum Subsequence
greedy
,
strings
1100
x5287
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x5452
405B
Domino Effect
1100
x5616
190A
Vasya and the Bus
greedy
,
math
1100
x5709
12C
Fruits
greedy
,
implementation
,
sortings
1100
x5728
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5855
331C1
The Great Julya Calendar
dp
1100
x5916
192B
Walking in the Rain
brute force
,
implementation
1100
x6138
242A
Heads or Tails
brute force
,
implementation
1100
x6229
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6374
955A
Feed the cat
greedy
,
math
1100
x6545
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6574
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6588
975B
Mancala
brute force
,
implementation
1100
x6734
884B
Japanese Crosswords Strike Back
implementation
1100
x6793
389B
Fox and Cross
greedy
,
implementation
1100
x6809
7A
Kalevitch and Chess
brute force
,
constructive algorithms
1100
x6831
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7015
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7087
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x7143
801A
Vicious Keyboard
brute force
1100
x7211
984B
Minesweeper
implementation
1100
x7252
950B
Intercepted Message
greedy
,
implementation
1100
x7294
825A
Binary Protocol
implementation
1100
x7528
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7594
845A
Chess Tourney
implementation
,
sortings
1100
x7626
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x7696
544A
Set of Strings
implementation
,
strings
1100
x7720
667A
Pouring Rain
geometry
,
math
1100
x7776
508A
Pasha and Pixels
brute force
1100
x7788
618B
Guess the Permutation
constructive algorithms
1100
x7832
858A
k-rounding
brute force
,
math
,
number theory
1100
x7841
624B
Making a String
greedy
,
sortings
1100
x7842
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x7851
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7870
629B
Far Relative’s Problem
brute force
1100
x7942
12B
Correct Solution?
implementation
,
sortings
1100
x7965
985A
Chess Placing
implementation
1100
x8062
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8198
495A
Digital Counter
implementation
1100
x8288
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8298
1146B
Hate "A"
implementation
,
strings
1100
x8321
602A
Two Bases
brute force
,
implementation
1100
x8357
834B
The Festive Evening
data structures
,
implementation
1100
x8506
592B
The Monster and the Squirrel
math
1100
x8540
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8644
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x8674
792A
New Bus Route
implementation
,
sortings
1100
x8720
938B
Run For Your Prize
brute force
,
greedy
1100
x8733
1173B
Nauuo and Chess
constructive algorithms
,
greedy
1100
x8753
1060B
Maximum Sum of Digits
greedy
1100
x8772
609B
The Best Gift
constructive algorithms
,
implementation
1100
x8785
1202A
You Are Given Two Binary Strings...
bitmasks
,
greedy
1100
x8789
121A
Lucky Sum
implementation
1100
x8803
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x8874
705B
Spider Man
games
,
math
1100
x9028
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9133
1033B
Square Difference
math
,
number theory
1100
x9142
1085B
Div Times Mod
math
1100
x9170
789A
Anastasia and pebbles
implementation
,
math
1100
x9211
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9252
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9257
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