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Before contest
Codeforces Round 941 (Div. 1)
37:47:35
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Before contest
Codeforces Round 941 (Div. 2)
37:47:35
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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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Problems
#
Name
188F
Binary Notation
*special problem
,
implementation
1400
x286
683D
Chocolate Bar
*special problem
,
math
1400
x319
188C
LCM
*special problem
,
implementation
,
math
1400
x434
188E
HQ9+
*special problem
,
implementation
1400
x489
100C
A+B
*special problem
,
implementation
1400
x514
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x515
649B
Этажи
constructive algorithms
1400
x518
1001G
Oracle for f(x) = k-th element of x
*special problem
1400
x531
1001C
Generate GHZ state
*special problem
1400
x646
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x664
1001D
Distinguish plus state and minus state
*special problem
1400
x675
1001B
Generate Bell state
*special problem
1400
x704
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x853
838A
Binary Blocks
brute force
1400
x906
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x997
1346B
Boot Camp
*special problem
,
greedy
1400
x1179
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1334
175B
Plane of Tanks: Pro
implementation
1400
x1358
770D
Draw Brackets!
*special problem
,
implementation
1400
x1567
958A1
Death Stars (easy)
implementation
1400
x1634
77A
Heroes
brute force
,
implementation
1400
x1741
417B
Crash
implementation
1400
x1747
1057B
DDoS
*special problem
,
brute force
1400
x1782
290D
Orange
*special problem
,
implementation
1400
x1782
120D
Three Sons
brute force
1400
x1892
958D1
Hyperspace Jump (easy)
expression parsing
,
math
1400
x2029
38C
Blinds
brute force
1400
x2078
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2083
316A2
Special Task
math
1400
x2097
174B
File List
dp
,
greedy
,
implementation
1400
x2188
45I
TCMCF+++
greedy
1400
x2300
413C
Jeopardy!
greedy
,
math
1400
x2301
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2334
108B
Datatypes
math
,
sortings
1400
x2407
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2409
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2452
523C
Name Quest
*special problem
,
greedy
1400
x2466
928B
Chat
*special problem
,
dp
1400
x2489
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2491
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2504
19A
World Football Cup
implementation
1400
x2575
125A
Measuring Lengths in Baden
math
1400
x2634
120E
Put Knight!
games
,
math
1400
x2639
1046F
Splitting money
implementation
1400
x2724
42A
Guilty --- to the kitchen!
greedy
,
implementation
1400
x2742
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2914
290A
Mysterious strings
*special problem
,
implementation
1400
x2941
1046C
Space Formula
greedy
1400
x3033
436B
Om Nom and Spiders
implementation
,
math
1400
x3039
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3102
245E
Mishap in Club
greedy
,
implementation
1400
x3219
30A
Accounting
brute force
,
math
1400
x3304
228B
Two Tables
brute force
,
implementation
1400
x3430
630L
Cracking the Code
implementation
,
math
1400
x3444
665B
Shopping
brute force
1400
x3475
120F
Spiders
dp
,
greedy
,
trees
1400
x3502
334B
Eight Point Sets
sortings
1400
x3541
513B1
Permutations
brute force
1400
x3575
430B
Balls Game
brute force
,
two pointers
1400
x3623
868B
Race Against Time
implementation
1400
x3628
402B
Trees in a Row
brute force
,
implementation
1400
x3686
745B
Hongcow Solves A Puzzle
implementation
1400
x3702
641B
Little Artem and Matrix
implementation
1400
x3733
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3742
1600J
Robot Factory
bitmasks
,
dfs and similar
1400
x3769
41B
Martian Dollar
brute force
1400
x3846
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3885
226A
Flying Saucer Segments
math
1400
x3899
272B
Dima and Sequence
implementation
,
math
1400
x3911
907B
Tic-Tac-Toe
implementation
1400
x4006
1250A
Berstagram
implementation
1400
x4020
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4064
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4071
198B
Jumping on Walls
shortest paths
1400
x4072
865A
Save the problem!
constructive algorithms
1400
x4135
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4264
60B
Serial Time!
dfs and similar
,
dsu
1400
x4432
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4465
197B
Limit
math
1400
x4533
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4539
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4550
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4605
111A
Petya and Inequiations
greedy
1400
x4616
1773E
Easy Assembly
greedy
,
sortings
1400
x4630
955B
Not simply beatiful strings
implementation
1400
x4731
630H
Benches
combinatorics
,
math
1400
x4733
803A
Maximal Binary Matrix
constructive algorithms
1400
x4735
24A
Ring road
graphs
1400
x4752
44E
Anfisa the Monkey
dp
1400
x4799
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4912
1184B1
The Doctor Meets Vader (Easy)
binary search
,
sortings
1400
x5074
261A
Maxim and Discounts
greedy
,
sortings
1400
x5086
981C
Useful Decomposition
implementation
,
trees
1400
x5115
141B
Hopscotch
geometry
,
math
1400
x5116
898C
Phone Numbers
implementation
,
strings
1400
x5126
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5184
1425F
Flamingoes of Mystery
interactive
1400
x5187
248B
Chilly Willy
math
,
number theory
1400
x5187
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5215
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5418
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