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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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*has extra registration
→ Filter Problems
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
Standings
Custom test
Problems
#
Name
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x10012
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17656
545D
Queue
greedy
,
implementation
,
sortings
1300
x25355
545B
Equidistant String
greedy
1100
x11690
544A
Set of Strings
implementation
,
strings
1100
x8285
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x22664
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x12328
527A
Playing with Paper
implementation
,
math
1100
x14508
526A
King of Thieves
brute force
,
implementation
1300
x4784
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x14809
523A
Rotate, Flip and Zoom
*special problem
,
implementation
1200
x2638
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8946
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x16523
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19793
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x39770
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7468
514A
Chewbaсca and Number
greedy
,
implementation
1200
x53658
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9654
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22741
508A
Pasha and Pixels
brute force
1100
x7968
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6692
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x16678
495A
Digital Counter
implementation
1100
x8515
493A
Vasya and Football
implementation
1300
x6130
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x76724
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x49536
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x10108
488A
Giga Tower
brute force
1100
x14333
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x17857
485B
Valuable Resources
brute force
,
greedy
1300
x6541
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x23263
482A
Diverse Permutation
constructive algorithms
,
greedy
1200
x9674
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x36939
478A
Initial Bet
implementation
1100
x25788
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x31158
475A
Bayan Bus
implementation
1100
x4779
474B
Worms
binary search
,
implementation
1200
x49290
472B
Design Tutorial: Learn from Life
1300
x7447
471B
MUH and Important Things
implementation
,
sortings
1300
x5965
471A
MUH and Sticks
implementation
1100
x13434
469B
Chat Online
implementation
1300
x12725
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x37968
466A
Cheap Travel
implementation
1200
x64366
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x27507
463A
Caisa and Sugar
brute force
,
implementation
1200
x9276
462B
Appleman and Card Game
greedy
1300
x14538
461A
Appleman and Toastman
greedy
,
sortings
1200
x15564
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x40794
459A
Pashmak and Garden
implementation
1200
x33166
456B
Fedya and Maths
math
,
number theory
1200
x16863
456A
Laptops
sortings
1100
x48798
454B
Little Pony and Sort by Shift
implementation
1200
x18257
451B
Sort the Array
implementation
,
sortings
1300
x45915
450B
Jzzhu and Sequences
implementation
,
math
1300
x26511
445A
DZY Loves Chessboard
dfs and similar
,
implementation
1200
x29989
439B
Devu, the Dumb Guy
implementation
,
sortings
1200
x14399
437A
The Child and Homework
implementation
1300
x9050
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x40483
433A
Kitahara Haruki's Gift
brute force
,
implementation
1100
x16481
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11729
431B
Shower Line
brute force
,
implementation
1200
x10867
429A
Xor-tree
dfs and similar
,
trees
1300
x10438
427B
Prison Transfer
data structures
,
implementation
1100
x14126
426B
Sereja and Mirroring
implementation
1300
x3814
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7772
416B
Art Union
brute force
,
dp
,
implementation
1300
x8771
413B
Spyke Chatting
implementation
1300
x1715
413A
Data Recovery
implementation
1200
x2662
412C
Pattern
implementation
,
strings
1200
x3943
408B
Garland
implementation
1200
x9384
405B
Domino Effect
1100
x5782
402A
Nuts
greedy
,
math
1100
x4618
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4436
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7782
389B
Fox and Cross
greedy
,
implementation
1100
x6941
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x12288
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9985
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x12481
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6818
379B
New Year Present
constructive algorithms
,
implementation
1200
x7281
378B
Semifinals
implementation
,
sortings
1300
x5257
376B
I.O.U.
implementation
1300
x6420
371B
Fox Dividing Cheese
math
,
number theory
1300
x11480
370B
Berland Bingo
implementation
1300
x2527
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x10391
368B
Sereja and Suffixes
data structures
,
dp
1100
x42583
366B
Dima and To-do List
brute force
,
implementation
1200
x6839
366A
Dima and Guards
implementation
1100
x4539
365B
The Fibonacci Segment
implementation
1100
x14553
365A
Good Number
implementation
1100
x18835
363B
Fence
brute force
,
dp
1100
x54053
362B
Petya and Staircases
implementation
,
sortings
1100
x13888
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x8097
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4517
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9463
353A
Domino
implementation
,
math
1200
x18625
352B
Jeff and Periods
implementation
,
sortings
1300
x16611
350A
TL
brute force
,
greedy
,
implementation
1200
x16480
349A
Cinema Line
greedy
,
implementation
1100
x30379
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9341
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