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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 days
Register now »
*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
361A
Levko and Table
constructive algorithms
,
implementation
800
x16784
344A
Magnets
implementation
800
x122747
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x218233
337A
Puzzles
greedy
900
x80822
330A
Cakeminator
brute force
,
implementation
800
x28830
320A
Magic Numbers
brute force
,
greedy
900
x39058
318A
Even Odds
math
900
x116035
313A
Ilya and Bank Account
implementation
,
number theory
900
x56929
306A
Candies
implementation
800
x7069
302A
Eugeny and Array
implementation
800
x9110
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5362
294A
Shaass and Oskols
implementation
,
math
800
x23822
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6107
282A
Bit++
implementation
800
x268589
281A
Word Capitalization
implementation
,
strings
800
x215870
278A
Circle Line
implementation
800
x11750
276A
Lunch Rush
implementation
900
x27824
275A
Lights Out
implementation
900
x30497
271A
Beautiful Year
brute force
800
x140913
268A
Games
brute force
800
x87667
267A
Subtractions
math
,
number theory
900
x7583
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x137213
266A
Stones on the Table
implementation
800
x194530
265A
Colorful Stones (Simplified Edition)
implementation
800
x37131
263B
Squares
greedy
,
implementation
,
sortings
900
x9012
263A
Beautiful Matrix
implementation
800
x249301
262A
Roma and Lucky Numbers
implementation
800
x20069
255A
Greg's Workout
implementation
800
x28989
248A
Cupboards
implementation
800
x22570
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9311
245A
System Administrator
implementation
800
x8499
244A
Dividing Orange
implementation
900
x7965
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x215424
233A
Perfect Permutation
implementation
,
math
800
x43037
231A
Team
brute force
,
greedy
800
x333287
228A
Is your horseshoe on the other hoof?
implementation
800
x112098
215A
Bicycle Chain
brute force
,
implementation
900
x14607
214A
System of Equations
brute force
800
x35865
208A
Dubstep
strings
900
x89418
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x22562
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x17023
200B
Drinks
implementation
,
math
800
x118474
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x26772
194A
Exams
implementation
,
math
900
x9920
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x7223
177A2
Good Matrix Elements
implementation
800
x7379
177A1
Good Matrix Elements
implementation
800
x8790
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x6172
169A
Chores
sortings
800
x6991
168A
Wizards and Demonstration
implementation
,
math
900
x10639
160A
Twins
greedy
,
sortings
900
x119509
158A
Next Round
*special problem
,
implementation
800
x254108
157A
Game Outcome
brute force
800
x7685
155A
I_love_\%username\%
brute force
800
x76692
152A
Marks
implementation
900
x16883
151A
Soft Drinking
implementation
,
math
800
x74805
149A
Business trip
greedy
,
implementation
,
sortings
900
x40159
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x94058
146A
Lucky Ticket
implementation
800
x15185
144A
Arrival of the General
implementation
800
x97568
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x84446
137A
Postcards and photos
implementation
900
x7219
136A
Presents
implementation
800
x119678
133A
HQ9+
implementation
900
x106749
130A
Hexagonal numbers
*special problem
,
implementation
900
x1635
129A
Cookies
implementation
900
x22885
127A
Wasted Time
geometry
900
x11305
119A
Epic Game
implementation
800
x27540
116A
Tram
implementation
800
x144541
115A
Party
dfs and similar
,
graphs
,
trees
900
x35030
112A
Petya and Strings
implementation
,
strings
800
x229457
110A
Nearly Lucky Number
implementation
800
x158245
104A
Blackjack
implementation
800
x15483
99A
Help Far Away Kingdom
strings
800
x6727
96A
Football
implementation
,
strings
900
x161012
94A
Restoring Password
implementation
,
strings
900
x10641
92A
Chips
implementation
,
math
800
x18971
84A
Toy Army
math
,
number theory
900
x15180
80A
Panoramix's Prediction
brute force
800
x54566
78A
Haiku
implementation
,
strings
800
x12971
71A
Way Too Long Words
strings
800
x392698
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x11602
61A
Ultra-Fast Mathematician
implementation
800
x112702
59A
Word
implementation
,
strings
800
x179495
52A
123-sequence
implementation
900
x8835
50A
Domino piling
greedy
,
math
800
x251656
49A
Sleuth
implementation
800
x13509
48A
Rock-paper-scissors
implementation
,
schedules
900
x6264
47A
Triangular numbers
brute force
,
math
800
x15225
46A
Ball Game
brute force
,
implementation
800
x8801
45A
Codecraft III
implementation
900
x6802
44A
Indian Summer
implementation
900
x11459
41A
Translation
implementation
,
strings
800
x149074
38A
Army
implementation
800
x21535
34B
Sale
greedy
,
sortings
900
x53285
34A
Reconnaissance 2
implementation
800
x30338
32B
Borze
expression parsing
,
implementation
800
x64850
32A
Reconnaissance
brute force
800
x12660
26A
Almost Prime
number theory
900
x32015
22A
Second Order Statistics
brute force
800
x22603
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