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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
13:36:33
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Difficulty:
—
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
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Custom test
Problems
#
Name
1143C
Queen
dfs and similar
,
trees
1400
x12738
1131B
Draw!
greedy
,
implementation
1400
x9759
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8668
1110B
Tape
greedy
,
sortings
1400
x11779
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15335
1103A
Grid game
constructive algorithms
,
implementation
1400
x9826
1102B
Array K-Coloring
greedy
,
sortings
1400
x10456
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8456
1095C
Powers Of Two
bitmasks
,
greedy
1400
x17040
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x10070
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8093
1068A
Birthday
math
1400
x6852
1066C
Books Queries
implementation
1400
x9723
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7320
1057B
DDoS
*special problem
,
brute force
1400
x1844
1046F
Splitting money
implementation
1400
x2801
1046C
Space Formula
greedy
1400
x3127
1009B
Minimum Ternary String
greedy
,
implementation
1400
x10169
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7551
1001G
Oracle for f(x) = k-th element of x
*special problem
1400
x538
1001D
Distinguish plus state and minus state
*special problem
1400
x682
1001C
Generate GHZ state
*special problem
1400
x654
1001B
Generate Bell state
*special problem
1400
x711
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7115
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5739
988C
Equal Sums
implementation
,
sortings
1400
x10282
987C
Three displays
brute force
,
dp
,
implementation
1400
x13627
981C
Useful Decomposition
implementation
,
trees
1400
x5498
978E
Bus Video System
combinatorics
,
math
1400
x9637
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x18538
975C
Valhalla Siege
binary search
1400
x9742
962C
Make a Square
brute force
,
implementation
,
math
1400
x7906
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5323
958D1
Hyperspace Jump (easy)
expression parsing
,
math
1400
x2079
958A1
Death Stars (easy)
implementation
1400
x1668
955B
Not simply beatiful strings
implementation
1400
x4841
954B
String Typing
implementation
,
strings
1400
x7291
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x9046
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6927
934A
A Compatible Pair
brute force
,
games
1400
x7021
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2502
928B
Chat
*special problem
,
dp
1400
x2544
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9250
911C
Three Garlands
brute force
,
constructive algorithms
1400
x7055
907B
Tic-Tac-Toe
implementation
1400
x4071
898C
Phone Numbers
implementation
,
strings
1400
x5310
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8282
868B
Race Against Time
implementation
1400
x3688
865A
Save the problem!
constructive algorithms
1400
x4335
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5564
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5683
838A
Binary Blocks
brute force
1400
x933
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x18477
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x6230
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9697
803A
Maximal Binary Matrix
constructive algorithms
1400
x4951
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4780
799B
T-shirt buying
data structures
,
implementation
1400
x8940
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10642
770D
Draw Brackets!
*special problem
,
implementation
1400
x1578
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x8347
762A
k-th divisor
math
,
number theory
1400
x20168
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x10338
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4635
745B
Hongcow Solves A Puzzle
implementation
1400
x3747
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7507
719B
Anatoly and Cockroaches
greedy
1400
x8510
713A
Sonya and Queries
data structures
,
implementation
1400
x8507
711B
Chris and Magic Square
constructive algorithms
,
implementation
1400
x8429
710B
Optimal Point on a Line
brute force
,
sortings
1400
x8817
703B
Mishka and trip
implementation
,
math
1400
x5688
699B
One Bomb
implementation
1400
x7615
698A
Vacations
dp
1400
x30839
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5760
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5276
683D
Chocolate Bar
*special problem
,
math
1400
x324
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x13196
677B
Vanya and Food Processor
implementation
,
math
1400
x7668
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7431
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x18330
665B
Shopping
brute force
1400
x3559
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4792
650A
Watchmen
data structures
,
geometry
,
math
1400
x15602
649B
Этажи
constructive algorithms
1400
x540
641B
Little Artem and Matrix
implementation
1400
x3989
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2429
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x4018
630L
Cracking the Code
implementation
,
math
1400
x3608
630H
Benches
combinatorics
,
math
1400
x5049
614B
Gena's Code
implementation
,
math
1400
x6932
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x8206
604B
More Cowbell
binary search
,
greedy
1400
x8508
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10950
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7338
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x21682
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8473
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17731
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x8044
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x18167
538A
Cutting Banner
brute force
,
implementation
1400
x7147
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