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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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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
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Custom test
Problems
#
Name
431B
Shower Line
brute force
,
implementation
1200
x10874
431A
Black Square
implementation
800
x55758
427B
Prison Transfer
data structures
,
implementation
1100
x14131
427A
Police Recruits
implementation
800
x79647
426A
Sereja and Mugs
implementation
800
x9260
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7772
424A
Squats
implementation
900
x8523
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x6133
420A
Start Up
implementation
1000
x6260
415A
Mashmokh and Lights
implementation
900
x9034
413A
Data Recovery
implementation
1200
x2664
412C
Pattern
implementation
,
strings
1200
x3943
412B
Network Configuration
greedy
,
sortings
900
x5463
412A
Poster
greedy
,
implementation
900
x4478
411A
Password Check
*special problem
,
implementation
800
x7291
408B
Garland
implementation
1200
x9389
408A
Line to Cashier
implementation
900
x11324
405B
Domino Effect
1100
x5782
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x103054
404A
Valera and X
implementation
1000
x24150
402A
Nuts
greedy
,
math
1100
x4618
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4437
401A
Vanya and Cards
implementation
,
math
800
x16348
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7784
400A
Inna and Choose Options
implementation
1000
x6531
389B
Fox and Cross
greedy
,
implementation
1100
x6942
389A
Fox and Number Game
greedy
,
math
1000
x14112
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x12290
387A
George and Sleep
implementation
900
x9723
386A
Second-Price Auction
implementation
800
x6466
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9986
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16532
384A
Coder
implementation
800
x16378
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x12485
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6819
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x67675
379B
New Year Present
constructive algorithms
,
implementation
1200
x7282
379A
New Year Candles
implementation
1000
x46764
378A
Playing with Dice
brute force
800
x24280
376A
Lever
implementation
,
math
900
x9376
373A
Collecting Beats is Fun
implementation
900
x10739
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x6144
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x10394
369A
Valera and Plates
greedy
,
implementation
900
x11114
368B
Sereja and Suffixes
data structures
,
dp
1100
x42606
368A
Sereja and Coat Rack
implementation
1000
x7525
366B
Dima and To-do List
brute force
,
implementation
1200
x6840
366A
Dima and Guards
implementation
1100
x4540
365B
The Fibonacci Segment
implementation
1100
x14556
365A
Good Number
implementation
1100
x18846
363B
Fence
brute force
,
dp
1100
x54110
363A
Soroban
implementation
800
x10825
362B
Petya and Staircases
implementation
,
sortings
1100
x13895
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x8098
361A
Levko and Table
constructive algorithms
,
implementation
800
x16799
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8578
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6861
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4517
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9464
353A
Domino
implementation
,
math
1200
x18638
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x25878
350A
TL
brute force
,
greedy
,
implementation
1200
x16483
349A
Cinema Line
greedy
,
implementation
1100
x30388
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9343
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8899
344A
Magnets
implementation
800
x122968
342A
Xenia and Divisors
greedy
,
implementation
1200
x12689
340A
The Wall
math
1200
x7690
339B
Xenia and Ringroad
implementation
1000
x70596
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x218745
337A
Puzzles
greedy
900
x80908
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x10147
334A
Candy Bags
implementation
1000
x18726
331C1
The Great Julya Calendar
dp
1100
x6237
330A
Cakeminator
brute force
,
implementation
800
x28861
327B
Hungry Sequence
math
1200
x19878
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x42531
322A
Ciel and Dancing
greedy
1000
x8244
320A
Magic Numbers
brute force
,
greedy
900
x39105
318A
Even Odds
math
900
x116252
316A1
Special Task
greedy
1100
x2680
315B
Sereja and Array
implementation
1200
x7041
313B
Ilya and Queries
dp
,
implementation
1100
x45142
313A
Ilya and Bank Account
implementation
,
number theory
900
x57027
312A
Whose sentence is it?
implementation
,
strings
1100
x4993
306A
Candies
implementation
800
x7074
304A
Pythagorean Theorem II
brute force
,
math
1200
x10728
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x8255
302A
Eugeny and Array
implementation
800
x9124
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x23223
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5364
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x8148
298B
Sail
brute force
,
greedy
,
implementation
1200
x14301
296A
Yaroslav and Permutations
greedy
,
math
1100
x23361
294A
Shaass and Oskols
implementation
,
math
800
x23833
292B
Network Topology
graphs
,
implementation
1200
x8539
292A
SMSC
implementation
1100
x2709
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6109
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x9322
287A
IQ Test
brute force
,
implementation
1100
x20003
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