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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
3 days
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Difficulty:
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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
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Status
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Custom test
Problems
#
Name
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x13140
1076A
Minimizing the String
greedy
,
strings
1200
x13186
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4263
1070K
Video Posts
implementation
1100
x4955
1070D
Garbage Disposal
greedy
1300
x4926
1068B
LCM
math
,
number theory
1200
x11702
1066A
Vova and Train
math
1100
x14619
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x10966
1064B
Equations of Mathematical Magic
math
1200
x7560
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x10399
1062A
A Prank
greedy
,
implementation
1300
x8835
1060B
Maximum Sum of Digits
greedy
1100
x8984
1059B
Forgery
implementation
1300
x7097
1055B
Alice and Hairdresser
dsu
,
implementation
1300
x5037
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8437
1043B
Lost Array
implementation
1200
x6308
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x16369
1042A
Benches
binary search
,
implementation
1100
x12987
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7131
1038C
Gambling
greedy
,
sortings
1300
x9444
1038B
Non-Coprime Partition
constructive algorithms
,
math
1100
x13662
1037C
Equalize
dp
,
greedy
,
strings
1300
x18957
1037B
Reach Median
greedy
1300
x10423
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x11224
1033B
Square Difference
math
,
number theory
1100
x9945
1032B
Personalized Cup
1200
x5005
1030C
Vasya and Golden Ticket
implementation
1300
x9470
1030B
Vasya and Cornfield
geometry
1100
x12403
1029B
Creating the Contest
dp
,
greedy
,
math
1200
x17067
1029A
Many Equal Substrings
implementation
,
strings
1300
x12392
1028B
Unnatural Conditions
constructive algorithms
,
math
1200
x9133
1027B
Numbers on the Chessboard
implementation
,
math
1200
x8405
1023C
Bracket Subsequence
greedy
1200
x10000
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8724
1017B
The Bits
implementation
,
math
1200
x9173
1016B
Segment Occurrences
brute force
,
implementation
1300
x9522
1015C
Songs Compression
sortings
1100
x18195
1015B
Obtaining the String
implementation
1200
x11640
1013B
And
greedy
1200
x7695
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x10199
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x12195
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x21499
1006B
Polycarp's Practice
greedy
,
implementation
,
sortings
1200
x13365
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11783
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9532
1003C
Intense Heat
brute force
,
implementation
,
math
1300
x10649
1003B
Binary String Constructing
constructive algorithms
1300
x11417
1002D2
Oracle for f(x) = b * x + (1 - b) * (1 - x) mod 2
1300
x381
1002D1
Oracle for f(x) = b * x mod 2
1200
x404
1002B1
Distinguish zero state and W state
1300
x478
1002A2
Generate superposition of zero state and a basis state
1300
x559
1001H
Oracle for f(x) = parity of the number of 1s in x
*special problem
1200
x533
1001F
Distinguish multi-qubit basis states
*special problem
1300
x539
1001A
Generate plus state or minus state
*special problem
1100
x1014
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8838
999C
Alphabetic Removals
implementation
1200
x18513
998B
Cutting
dp
,
greedy
,
sortings
1200
x13207
996B
World Cup
binary search
,
math
1300
x9074
990B
Micro-World
greedy
,
sortings
1200
x8163
989B
A Tide of Riverscape
constructive algorithms
,
strings
1200
x7067
988B
Substrings Sort
sortings
,
strings
1100
x18606
987B
High School: Become Human
math
1100
x11657
985B
Switches and Lamps
implementation
1200
x7413
985A
Chess Placing
implementation
1100
x8175
984B
Minesweeper
implementation
1100
x7394
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8330
982A
Row
brute force
,
constructive algorithms
1200
x9105
977C
Less or Equal
sortings
1200
x35457
976B
Lara Croft and the New Game
implementation
,
math
1300
x5731
975B
Mancala
brute force
,
implementation
1100
x6871
967A
Mind the Gap
implementation
1100
x4379
965B
Battleship
implementation
1300
x4578
964B
Messages
math
1300
x4370
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7731
962A
Equator
implementation
1300
x12857
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x21283
960A
Check the string
implementation
1200
x8234
959B
Mahmoud and Ehab and the message
dsu
,
greedy
,
implementation
1200
x9685
958C1
Encryption (easy)
brute force
1200
x2916
957A
Tritonic Iridescence
implementation
1300
x5786
955A
Feed the cat
greedy
,
math
1100
x6678
950B
Intercepted Message
greedy
,
implementation
1100
x7600
946C
String Transformation
greedy
,
strings
1300
x8903
946B
Weird Subtraction Process
math
,
number theory
1100
x10908
940A
Points on the line
brute force
,
greedy
,
sortings
1200
x8340
938B
Run For Your Prize
brute force
,
greedy
1100
x8880
934B
A Prosperous Lot
constructive algorithms
,
implementation
1200
x8713
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x8200
931B
World Cup
constructive algorithms
,
implementation
1200
x7159
929B
Места в самолёте
*special problem
,
implementation
1300
x2045
928A
Login Verification
*special problem
,
strings
1200
x3403
926A
2-3-numbers
implementation
,
math
1300
x3816
924A
Mystical Mosaic
greedy
,
implementation
1300
x5057
922B
Magic Forest
brute force
1300
x8526
922A
Cloning Toys
implementation
1300
x11716
920B
Tea Queue
implementation
1200
x7397
919C
Seat Arrangements
brute force
,
implementation
1300
x9000
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x28433
915B
Browser
implementation
1300
x7800
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8637
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